CN204886985U - Wireless early warning broadcast machine who realizes differentiated control is controlled to multicenter - Google Patents
Wireless early warning broadcast machine who realizes differentiated control is controlled to multicenter Download PDFInfo
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- CN204886985U CN204886985U CN201520663898.0U CN201520663898U CN204886985U CN 204886985 U CN204886985 U CN 204886985U CN 201520663898 U CN201520663898 U CN 201520663898U CN 204886985 U CN204886985 U CN 204886985U
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Abstract
The utility model discloses a wireless early warning broadcast machine who realizes differentiated control is controlled to multicenter, including control center, zone control ware and controller, still be provided with signal transceiver, GPRS module, audio input equipment, memory, solar cell and broadcast machine on this controller, and this controller pass through signal transceiver respectively with zone control ware and broadcast machine wireless connection, this zone control ware is connected with control center through wireless network again, broadcast machine is become by loudspeaker and the solar array that is connected with these loudspeaker again, be provided with audio circuit in loudspeaker, be provided with a signal transmission circuit respectively in signal transceiver and loudspeaker. The utility model provides a wireless early warning broadcast machine who realizes differentiated control is controlled to multicenter, reduction control center's that can be fine burden can let the relevant better calamity information of learning of personnel when the early warning to select more pertinent mode to deal with, fine protection people's the safety of life and property.
Description
Technical field
The utility model belongs to disaster safe early warning field, and particularly a kind of manipulation of the multicenter for field realizes the wireless alarming speech amplifier of differentiated control.
Background technology
Society, the natural calamity in field takes place frequently, the serious fail safe that have impact on people's life, and then the fail safe of people to environment is more paid close attention to.And existing equipment only can adopt original the tinkle of bells to carry out early warning when carrying out early warning in the wild; be difficult to allow the personnel be in prewarning area learn the relevant information of the condition of a disaster; thus make related personnel be difficult to adopt correct mode to carry out keeping away calamity; and the condition of a disaster occur in each second be all very valuable; if do not take correct mode evade disaster or prevent; the life safety of the related personnel of impact that will be serious, is unfavorable for life and the property of protecting people.When reality uses, if control centre connects too much prior-warning device greatly will affect its efficiency run, even exceed its busy hour in service data and it also can be caused to crash, greatly have impact on the normal issue of early warning information.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above; provide the wireless alarming speech amplifier that multicenter manipulation realizes differentiated control; can be good at the burden reducing control centre; related personnel can be allowed better disaster information is learnt when early warning; thus select more appropriate mode to tackle, well protect the life of people and the safety of property.
To achieve these goals, the utility model realizes by the following technical solutions:
Multicenter manipulation realizes the wireless alarming speech amplifier of differentiated control, comprise control centre, zone controller and controller, this controller is also provided with signal transceiver, GPRS module, audio input device, memory, solar cell and speech amplifier, and this controller by signal transceiver respectively with zone controller and speech amplifier wireless connections, this zone controller is connected with control centre by wireless network again; Speech amplifier is made up of loudspeaker and the solar cell that is connected with these loudspeaker again; In loudspeaker, be provided with acoustics circuit, in signal transceiver and loudspeaker, be respectively arranged with a signal transmission circuit.
Further, above-mentioned acoustics circuit is by operational amplifier P1, operational amplifier P2, slide rheostat RP1, loudspeaker BL1, metal-oxide-semiconductor Q1, negative pole is connected with the sliding end of slide rheostat RP1, the electric capacity C2 that positive pole is connected with the positive input terminal of operational amplifier P1, negative pole is connected with one end of slide rheostat RP1, the electric capacity C3 that positive pole is connected with the positive pole of electric capacity C2 after resistance R2, be serially connected in the resistance R3 between the source electrode of metal-oxide-semiconductor Q1 and drain electrode, one end is connected with the positive pole of electric capacity C3, the resistance R1 that the other end is connected with the positive power source terminal of operational amplifier P1, negative pole is connected with the source electrode of metal-oxide-semiconductor Q1, the electric capacity C4 that positive pole is connected with the negative input end of operational amplifier P1 after resistance R4, be serially connected in the resistance R5 between the negative input end of operational amplifier P1 and output, P pole is connected with the negative pole of electric capacity C4, the diode D2 that N pole is connected with the output of op-amp P1, N pole is connected with the positive power source terminal of operational amplifier P1, the diode D1 that P pole is connected with the N pole of diode D2, positive pole is connected with the N pole of diode D1, the electric capacity C1 of minus earth, negative pole is connected with the negative pole of electric capacity C4, the electric capacity C5 that positive pole is connected with the P pole of diode D1 after resistance R6, positive pole is connected with the P pole of diode D1, the electric capacity C6 that negative pole is connected with the positive input terminal of operational amplifier P12 after resistance R7, be serially connected in the resistance R8 between the positive input terminal of operational amplifier P2 and output, positive pole is connected with the negative input end of operational amplifier P2, the electric capacity C7 that negative pole is connected with the negative pole of electric capacity C4, and positive pole is connected with the output of operational amplifier P2, the electric capacity C8 that negative pole is connected with the input of loudspeaker BL1 forms, wherein, one end of slide rheostat RP1 is as input, the drain electrode of metal-oxide-semiconductor Q1 is connected with the positive pole of electric capacity C3, the minus earth of electric capacity C4, the negative pole of electric capacity C4 is also connected with the negative power end of operational amplifier P1, the positive pole of electric capacity C1 is also connected to input power, and the negative pole of electric capacity C7 is connected with the output of loudspeaker BL1.
Further, above-mentioned signal transmission circuit is by operational amplifier P3, operational amplifier P4, triode VT1, triode VT2, antenna N, metal-oxide-semiconductor Q2, transformer T1, the resistance R9 that one end is connected with the base stage of triode VT1, positive pole is connected with the base stage of triode VT1, the electric capacity C9 that negative pole is connected with the Same Name of Ends of the primary coil of transformer T1, positive pole is connected with the collector electrode of triode VT1, the electric capacity C10 that negative pole is connected with the negative pole of electric capacity C9, positive pole is connected with the positive pole of electric capacity C10, the electric capacity C11 that negative pole is connected with the base stage of triode VT2, be serially connected in the resistance R10 between the base stage of triode VT2 and emitter, one end is connected with the collector electrode of triode VT2, the inductance L 1 that the other end is connected with the non-same polarity of the primary coil of transformer T1, positive pole is connected with the collector electrode of triode VT2, negative pole is in turn through inductance L 2, the electric capacity C12 be connected with the negative input end of operational amplifier P3 after resistance R11, positive pole is connected with the positive input terminal of operational amplifier P3, the electric capacity C13 of minus earth, be serially connected in the resistance R12 between the negative input end of operational amplifier P3 and output, positive pole is connected with the output of operational amplifier P3, the electric capacity C14 that negative pole is connected with the negative input end of operational amplifier P4 after resistance R13, be serially connected in the resistance R14 between the negative input end of operational amplifier P4 and output, positive pole is connected with the positive input terminal of operational amplifier P4, the electric capacity C15 of minus earth, P pole is connected with the negative pole of electric capacity C15, the diode D4 that N pole is connected with the output of operational amplifier P4 after electric capacity C16, P pole is connected with the N pole of diode D4, the diode D3 that N pole is connected with antenna N, positive pole is connected with antenna N, the electric capacity C17 that negative pole is connected with the P pole of diode D4, and form with the resistance R15 that electric capacity C17 is arranged in parallel, wherein, the grid of metal-oxide-semiconductor Q2 is connected with the base stage of triode VT2, source electrode is connected with the collector electrode of triode VT2, draining is connected with the non-same polarity of the primary coil of transformer T1, the grounded emitter of triode VT1, the other end of resistance R9 and the link of resistance R10 and triode VT2 are jointly as input, the Same Name of Ends of the secondary coil of transformer T1 is connected to the input voltage of 9V, non-same polarity is connected with the positive pole of electric capacity C11, the positive input terminal of operational amplifier P3 and operational amplifier P4 is connected to respectively the input voltage of 5V.
The utility model comparatively prior art is compared, and has the following advantages and beneficial effect:
(1) the utility model is provided with solar cell, making equipment operationally without the need to carrying out long-range pulling strings, greatly reducing the laying cost of equipment, needed for the operation that can be good at support equipment, improves the running time of equipment.
(2) the utility model the utility model is provided with memory, can by stored therein for early warning sound, play when needs early warning, also be provided with audio input device in addition, make product can carry out the typing of audio frequency in erecting bed, better actual user demand of having fitted, can the situation different according to locality record prompt tone.
(3) the utility model is provided with GPRS module, control centre can be made better to position the position residing for controller, thus make more reasonably to be distributed by the location of control centre when needing to arrange many motors control device, improve the utilance of resource.
(4) loudspeaker of the present utility model adopt the pattern of wireless connections to be connected with controller, well improve its flexibility arranged and convenience, also by its connection and built-in autoscope, its ruuning situation is judged simultaneously, further increase the fail safe that it uses.
(5) the utility model is provided with controller connected successively, zone controller and control centre, the heart has carried out to controller by control area controller control in the controlling, to greatly reduce in control centre directly connect need control unit, and then reduce the operation burden of control centre, improve data-handling capacity and the useful life of control centre, the control range promoting control centre can also be crossed simultaneously, reduce further product and lay the required cost dropped into.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the circuit diagram of acoustics circuit of the present utility model.
Fig. 3 is the circuit diagram of signal transmission circuit of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment 1
As shown in Figure 1, the utility model comprises control centre, zone controller and controller, this controller is also provided with signal transceiver, GPRS module, audio input device, memory, solar cell and speech amplifier, and this controller by signal transceiver respectively with zone controller and speech amplifier wireless connections, this zone controller is connected with control centre by wireless network again; Speech amplifier is made up of loudspeaker and the solar cell that is connected with these loudspeaker again; In loudspeaker, be provided with acoustics circuit, in signal transceiver and loudspeaker, be respectively arranged with a signal transmission circuit.The memory device that memory is wherein SD card or is connected with controller by USB interface.
During installation, first controller is arranged on relevant position, and the speech amplifier be connected with this controller is erected at higher position so that the long-range transmission of early warning information, this speech amplifier and controller pass through wireless connections, avoid the laying of circuit, simplify installation, improve the flexibility of installation, then the solar cell of controller and speech amplifier is placed in the good position of daylighting, and SD card or memory device are connected on the controller, and controller is connected with control centre by wireless network, early warning sound is preserved in SD card wherein or memory device, this early warning sound can shift to an earlier date typing, also on-the-spot typing can be carried out in erecting bed by audio input device, by controller, concrete data parameters is arranged after equipment installation, thus make product that different early warning sounds can be selected to report when carrying out different early warning, then controller is connected with zone controller by wireless network, then zone controller is connected with control centre.In loudspeaker, be provided with autoscope, Real-time Feedback is carried out to its ruuning situation, then situation is fed back to control centre when controller receives problem feedback signal or lose the connection of speech amplifier, thus reach the object of the antitheft detection of speech amplifier.
As shown in Figure 2, above-mentioned acoustics circuit by operational amplifier P1, operational amplifier P2, slide rheostat RP1, loudspeaker BL1, metal-oxide-semiconductor Q1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, diode D1, and diode D2 forms.
During connection, the negative pole of electric capacity C2 is connected with the sliding end of slide rheostat RP1, positive pole is connected with the positive input terminal of operational amplifier P1, the negative pole of electric capacity C3 is connected with one end of slide rheostat RP1, positive pole is connected with the positive pole of electric capacity C2 after resistance R2, resistance R3 is serially connected between the source electrode of metal-oxide-semiconductor Q1 and drain electrode, one end of resistance R1 is connected with the positive pole of electric capacity C3, the other end is connected with the positive power source terminal of operational amplifier P1, the negative pole of electric capacity C4 is connected with the source electrode of metal-oxide-semiconductor Q1, positive pole is connected with the negative input end of operational amplifier P1 after resistance R4, between the negative input end that resistance R5 is serially connected in operational amplifier P1 and output, the P pole of diode D2 is connected with the negative pole of electric capacity C4, N pole is connected with the output of op-amp P1, the N pole of diode D1 is connected with the positive power source terminal of operational amplifier P1, P pole is connected with the N pole of diode D2, the positive pole of electric capacity C1 is connected with the N pole of diode D1, minus earth, the negative pole of electric capacity C5 is connected with the negative pole of electric capacity C4, positive pole is connected with the P pole of diode D1 after resistance R6, the positive pole of electric capacity C6 is connected with the P pole of diode D1, negative pole is connected with the positive input terminal of operational amplifier P12 after resistance R7, between the positive input terminal that resistance R8 is serially connected in operational amplifier P2 and output, the positive pole of electric capacity C7 is connected with the negative input end of operational amplifier P2, negative pole is connected with the negative pole of electric capacity C4, the positive pole of electric capacity C8 is connected with the output of operational amplifier P2, negative pole is connected with the input of loudspeaker BL1, wherein, one end of slide rheostat RP1 is as input, the drain electrode of metal-oxide-semiconductor Q1 is connected with the positive pole of electric capacity C3, the minus earth of electric capacity C4, the negative pole of electric capacity C4 is also connected with the negative power end of operational amplifier P1, the positive pole of electric capacity C1 is also connected to input power, and the negative pole of electric capacity C7 is connected with the output of loudspeaker BL1.
As shown in Figure 3, above-mentioned signal transmission circuit by operational amplifier P3, operational amplifier P4, triode VT1, triode VT2, antenna N, metal-oxide-semiconductor Q2, transformer T1, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, electric capacity C16, electric capacity C17, inductance L 1, inductance L 2, diode D3, and diode D4 forms.
During connection, one end of resistance R9 is connected with the base stage of triode VT1, the positive pole of electric capacity C9 is connected with the base stage of triode VT1, negative pole is connected with the Same Name of Ends of the primary coil of transformer T1, the positive pole of electric capacity C10 is connected with the collector electrode of triode VT1, negative pole is connected with the negative pole of electric capacity C9, the positive pole of electric capacity C11 is connected with the positive pole of electric capacity C10, negative pole is connected with the base stage of triode VT2, between the base stage that resistance R10 is serially connected in triode VT2 and emitter, one end of inductance L 1 is connected with the collector electrode of triode VT2, the other end is connected with the non-same polarity of the primary coil of transformer T1, the positive pole of electric capacity C12 is connected with the collector electrode of triode VT2, negative pole is in turn through inductance L 2, be connected with the negative input end of operational amplifier P3 after resistance R11, the positive pole of electric capacity C13 is connected with the positive input terminal of operational amplifier P3, minus earth, between the negative input end that resistance R12 is serially connected in operational amplifier P3 and output, the positive pole of electric capacity C14 is connected with the output of operational amplifier P3, negative pole is connected with the negative input end of operational amplifier P4 after resistance R13, between the negative input end that resistance R14 is serially connected in operational amplifier P4 and output, the positive pole of electric capacity C15 is connected with the positive input terminal of operational amplifier P4, minus earth, the P pole of diode D4 is connected with the negative pole of electric capacity C15, N pole is connected with the output of operational amplifier P4 after electric capacity C16, the P pole of diode D3 is connected with the N pole of diode D4, N pole is connected with antenna N, electric capacity C17 positive pole is connected with antenna N, negative pole is connected with the P pole of diode D4, resistance R15 and electric capacity C17 is arranged in parallel, wherein, the grid of metal-oxide-semiconductor Q2 is connected with the base stage of triode VT2, source electrode is connected with the collector electrode of triode VT2, draining is connected with the non-same polarity of the primary coil of transformer T1, the grounded emitter of triode VT1, the other end of resistance R9 and the link of resistance R10 and triode VT2 are jointly as input, the Same Name of Ends of the secondary coil of transformer T1 is connected to the input voltage of 9V, non-same polarity is connected with the positive pole of electric capacity C11, the positive input terminal of operational amplifier P3 and operational amplifier P4 is connected to respectively the input voltage of 5V.
Embodiment 2
The difference of the present embodiment and embodiment 1 with, be connected with several zone controllers in the heart in the controlling, and several controllers are also connected with on each zone controller, so just well reduce the number of devices that control centre directly connects, reduce further required data transmission interface, the operating load of control centre is reduced, better avoids control centre and break down in running, improve useful life and the area coverage of product; Each controller is all positioned by GPRS module, so just can be monitored distributing position of the present utility model by control centre easily, more reasonably can arrange the setting position of early warning speech amplifier, further increase the effect of early warning.
Embodiment 3
The difference of the present embodiment and embodiment 1 or embodiment 2 is, each controller is all connected with at least two speech amplifiers.Reduce further the cost that product is laid, reducing the difficulty of laying with safeguarding, also reducing the number of devices that zone controller connects simultaneously, improve the runnability of zone controller.
By said method, just well the utility model can be realized.
Claims (3)
1. multicenter manipulation realizes the wireless alarming speech amplifier of differentiated control, it is characterized in that, comprise control centre, zone controller and controller, this controller is also provided with signal transceiver, GPRS module, audio input device, memory, solar cell and speech amplifier, and this controller by signal transceiver respectively with zone controller and speech amplifier wireless connections, this zone controller is connected with control centre by wireless network again; Speech amplifier is made up of loudspeaker and the solar cell that is connected with these loudspeaker again; In loudspeaker, be provided with acoustics circuit, in signal transceiver and loudspeaker, be respectively arranged with a signal transmission circuit.
2. multicenter manipulation according to claim 1 realizes the wireless alarming speech amplifier of differentiated control, it is characterized in that, described acoustics circuit is by operational amplifier P1, operational amplifier P2, slide rheostat RP1, loudspeaker BL1, metal-oxide-semiconductor Q1, negative pole is connected with the sliding end of slide rheostat RP1, the electric capacity C2 that positive pole is connected with the positive input terminal of operational amplifier P1, negative pole is connected with one end of slide rheostat RP1, the electric capacity C3 that positive pole is connected with the positive pole of electric capacity C2 after resistance R2, be serially connected in the resistance R3 between the source electrode of metal-oxide-semiconductor Q1 and drain electrode, one end is connected with the positive pole of electric capacity C3, the resistance R1 that the other end is connected with the positive power source terminal of operational amplifier P1, negative pole is connected with the source electrode of metal-oxide-semiconductor Q1, the electric capacity C4 that positive pole is connected with the negative input end of operational amplifier P1 after resistance R4, be serially connected in the resistance R5 between the negative input end of operational amplifier P1 and output, P pole is connected with the negative pole of electric capacity C4, the diode D2 that N pole is connected with the output of op-amp P1, N pole is connected with the positive power source terminal of operational amplifier P1, the diode D1 that P pole is connected with the N pole of diode D2, positive pole is connected with the N pole of diode D1, the electric capacity C1 of minus earth, negative pole is connected with the negative pole of electric capacity C4, the electric capacity C5 that positive pole is connected with the P pole of diode D1 after resistance R6, positive pole is connected with the P pole of diode D1, the electric capacity C6 that negative pole is connected with the positive input terminal of operational amplifier P12 after resistance R7, be serially connected in the resistance R8 between the positive input terminal of operational amplifier P2 and output, positive pole is connected with the negative input end of operational amplifier P2, the electric capacity C7 that negative pole is connected with the negative pole of electric capacity C4, and positive pole is connected with the output of operational amplifier P2, the electric capacity C8 that negative pole is connected with the input of loudspeaker BL1 forms, wherein, one end of slide rheostat RP1 is as input, the drain electrode of metal-oxide-semiconductor Q1 is connected with the positive pole of electric capacity C3, the minus earth of electric capacity C4, the negative pole of electric capacity C4 is also connected with the negative power end of operational amplifier P1, the positive pole of electric capacity C1 is also connected to input power, and the negative pole of electric capacity C7 is connected with the output of loudspeaker BL1.
3. multicenter manipulation according to claim 2 realizes the wireless alarming speech amplifier of differentiated control, it is characterized in that, described signal transmission circuit is by operational amplifier P3, operational amplifier P4, triode VT1, triode VT2, antenna N, metal-oxide-semiconductor Q2, transformer T1, the resistance R9 that one end is connected with the base stage of triode VT1, positive pole is connected with the base stage of triode VT1, the electric capacity C9 that negative pole is connected with the Same Name of Ends of the primary coil of transformer T1, positive pole is connected with the collector electrode of triode VT1, the electric capacity C10 that negative pole is connected with the negative pole of electric capacity C9, positive pole is connected with the positive pole of electric capacity C10, the electric capacity C11 that negative pole is connected with the base stage of triode VT2, be serially connected in the resistance R10 between the base stage of triode VT2 and emitter, one end is connected with the collector electrode of triode VT2, the inductance L 1 that the other end is connected with the non-same polarity of the primary coil of transformer T1, positive pole is connected with the collector electrode of triode VT2, negative pole is in turn through inductance L 2, the electric capacity C12 be connected with the negative input end of operational amplifier P3 after resistance R11, positive pole is connected with the positive input terminal of operational amplifier P3, the electric capacity C13 of minus earth, be serially connected in the resistance R12 between the negative input end of operational amplifier P3 and output, positive pole is connected with the output of operational amplifier P3, the electric capacity C14 that negative pole is connected with the negative input end of operational amplifier P4 after resistance R13, be serially connected in the resistance R14 between the negative input end of operational amplifier P4 and output, positive pole is connected with the positive input terminal of operational amplifier P4, the electric capacity C15 of minus earth, P pole is connected with the negative pole of electric capacity C15, the diode D4 that N pole is connected with the output of operational amplifier P4 after electric capacity C16, P pole is connected with the N pole of diode D4, the diode D3 that N pole is connected with antenna N, positive pole is connected with antenna N, the electric capacity C17 that negative pole is connected with the P pole of diode D4, and form with the resistance R15 that electric capacity C17 is arranged in parallel, wherein, the grid of metal-oxide-semiconductor Q2 is connected with the base stage of triode VT2, source electrode is connected with the collector electrode of triode VT2, draining is connected with the non-same polarity of the primary coil of transformer T1, the grounded emitter of triode VT1, the other end of resistance R9 and the link of resistance R10 and triode VT2 are jointly as input, the Same Name of Ends of the secondary coil of transformer T1 is connected to the input voltage of 9V, non-same polarity is connected with the positive pole of electric capacity C11, the positive input terminal of operational amplifier P3 and operational amplifier P4 is connected to respectively the input voltage of 5V.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822583A (en) * | 2016-04-29 | 2016-08-03 | 成都瑞阳机械有限公司 | High-recognition safe type centrifugal fan intelligent control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822583A (en) * | 2016-04-29 | 2016-08-03 | 成都瑞阳机械有限公司 | High-recognition safe type centrifugal fan intelligent control system |
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Address after: Guanghua village street Qingyang District 610000 in Sichuan Province, Chengdu City No. 4 Building 1, No. 102 Patentee after: CHENGDU WANJIANG GANGLI TECHNOLOGY Co.,Ltd. Address before: Guanghua village street Qingyang District 610000 in Sichuan Province, Chengdu City No. 4 Building 1, No. 102 Patentee before: CHENGDU WANJIANG GANGLI TECHNOLOGY Co.,Ltd. |
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Denomination of utility model: Wireless early warning broadcast machine who realizes differentiated control is controlled to multicenter Effective date of registration: 20180412 Granted publication date: 20151216 Pledgee: Bank of Dalian Co.,Ltd. Chengdu Branch Pledgor: CHENGDU WANJIANG GANGLI TECHNOLOGY Co.,Ltd. Registration number: 2018510000005 |
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Date of cancellation: 20201015 Granted publication date: 20151216 Pledgee: Bank of Dalian Co.,Ltd. Chengdu Branch Pledgor: CHENGDU WANJIANG GANGLI TECHNOLOGY Co.,Ltd. Registration number: 2018510000005 |
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Denomination of utility model: Wireless early warning broadcasting machine with multi center control and hierarchical management Effective date of registration: 20201027 Granted publication date: 20151216 Pledgee: Bank of Dalian Co.,Ltd. Chengdu Branch Pledgor: CHENGDU WANJIANG GANGLI TECHNOLOGY Co.,Ltd. Registration number: Y2020980007191 |
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