CN102496771A - Method and device for installing large-sized steel structural antenna - Google Patents
Method and device for installing large-sized steel structural antenna Download PDFInfo
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- CN102496771A CN102496771A CN2011104254183A CN201110425418A CN102496771A CN 102496771 A CN102496771 A CN 102496771A CN 2011104254183 A CN2011104254183 A CN 2011104254183A CN 201110425418 A CN201110425418 A CN 201110425418A CN 102496771 A CN102496771 A CN 102496771A
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Abstract
The invention discloses a method and a device for installing a large-sized steel structural antenna. The method comprises the following steps of: dividing the large-sized steel structural antenna into three sections, namely a top section, a middle section and a bottom section according to elevations of installing positions; installing the bottom section first and then installing the top section; and installing the middle section by using a lifting device. The assembled top section is lifted by the lifting device to implement an installing way from the top to the bottom, so that in the process of installing the large-sized steel structural antenna, the overhead posture is stable, the overhead lifting is easy and convenient, the additional dynamic load is low, the installing is safe and reliable and the working efficiency is high.
Description
Technical field
The present invention relates to the construction and installation technical field, especially a kind of installation method of large-scale steel structure antenna and device.
Background technology
For ease of transportation, installation, the large-scale steel structure antenna is divided into plurality of sections and after factory makes, is transported to the field conduct installation, at present; The erection sequence of large-scale steel structure antenna begins upwards to install step by step by the bottom; Along with the variation of setting height(from bottom), during near the top of large-scale steel structure antenna, the high-altitude of loop wheel machine is controlled, the difficulty of the installing and locating of member, welding and adjustment all strengthens thereupon; Cause operating efficiency to reduce, work is dangerous to improve.
Summary of the invention
The installation method and the device of a kind of large-scale steel structure antenna that the objective of the invention is to be directed against the deficiency of prior art and provide; The present invention has aerial statue in large-scale steel structure sky line process is installed stable; Upper air installing is easy, and additional dynamic load is little, the characteristics of safe and reliable and high efficiency.
The concrete technical scheme that realizes the object of the invention is:
A kind of installation method of large-scale steel structure antenna is characterized in: the large-scale steel structure antenna is divided into top, three sections in middle part and bottom by the absolute altitude position, and the steel construction antenna of each section is made up of several basic segments, specifically may further comprise the steps:
A), the installation of bottom section steel construction antenna
First basic segment of bottom section steel construction antenna is loaded in the concrete of building center, and from bottom to top the segmentation welding is fixing successively for all the other basic segments, and periphery forms the basis of bottom section, and bottom section steel construction antenna is exposed with the concrete cast;
B), operation platform and lifting device are set
On the basis of bottom section, build an operation platform and lifting device be set, and on operation platform track that leads to mounting center of horizontal laying;
C), the assembling of top section steel construction antenna
First basic segment of top section steel construction antenna is placed on the operation platform in the lifting device, promote all the other basic segments from bottom to top segmentation installation successively, form holistic top section steel construction antenna through manual work;
D), the installation of central section first basic segment
Stop after adopting lifting device top section to be risen to the height of a basic segment that is higher than central section; Central section first basic segment is delivered to the mounting center of operation platform with railcar; Make top section descending and be seated the top of central section first basic segment through lifting device, proofread and correct also welding;
E), the installation of central section second basic segment
Stop after adopting lifting device top section to be risen to the height of a basic segment that is higher than central section together with first basic segment; Central section second basic segment is delivered to the mounting center of operation platform with railcar; Make top section descending and be seated the second basic segment top through lifting device, proofread and correct also welding together with first basic segment;
F), the installation of other basic segment of central section
Circulation step e), until all basic segment installations of central section;
G), remove operation platform
Adopt lifting device that top section that connects as one and central section are promoted, make it to break away from operation platform, remove track and operation platform, again that top section and central section is little descending, make it to be seated bottom section steel construction antenna exposed junction, proofread and correct and welding;
H), remove lifting device.
A kind of lifting device of implementing said method, it comprises derrick, goes up joist, joist, hydraulic jack, hoist cable, anchor sheet and Hydraulic Station down, said derrick is the four prisms cylinder that is made up of the pole of four root posts and several level and diagonal brace; Divide two-layer several wind resistance bars that are provided with on the column; Last joist, following joist are the rectangle framework, and the framework center is the hole, and the hole periphery is arranged with several anchor eyes; Last joist bottom is provided with the oil cylinder pedestal; The framework of following joist is provided with the column pedestal, and hydraulic jack is made up of cylinder body and piston, and cylinder body is provided with the oily interface of turnover; Hoist cable is several; Four root posts of said derrick are fixed on the basis; The column pedestal of following joist is fixedly connected with column; The top that the cylinder body of hydraulic jack is located at derrick is fixedly connected with column, and the oil cylinder pedestal of last joist is fixed on the piston of hydraulic jack, and hoist cable penetrates in the anchor eye of joist and following joist; The anchor sheet is located between anchor eye and the hoist cable, and Hydraulic Station is connected with the turnover oil interface of cylinder body through oil pipe.
Said wind resistance bar is made up of pole socket body and adjusting rod, divides two-layer being located at down between joist and the hydraulic jack, and the pole socket body is fixed on four root posts, and adjusting rod points to mounting center.
Said anchor eye is a conical bore, and the anchor sheet is the sheet that cone is cut.
The present invention is divided into top, three sections in middle part and bottom with the large-scale steel structure antenna by the absolute altitude of installation site, and bottom section at first is installed, and next installs top section; Especially adopt lifting device that central section is installed; Implement from top to bottom mounting means, in large-scale steel structure sky line process is installed, have aerial statue and stablize, upper air installing is easy; Additional dynamic load is little, the characteristics of safe and reliable and high efficiency.
Description of drawings
The panorama sketch map that Fig. 1 installs for the present invention;
Fig. 2 is the structural representation of lifting device of the present invention;
Fig. 3 is the wind resistance bar structural representation in Fig. 2 A-A cross section;
Fig. 4 is the working state schematic representation of lifting device of the present invention.
Embodiment
Consult Fig. 1, Fig. 3 and Fig. 4, method of the present invention is: the large-scale steel structure antenna is divided into top, three sections in middle part and bottom by the absolute altitude position, and the steel construction antenna of each section is made up of several basic segments, specifically may further comprise the steps:
A), the installation of bottom section steel construction antenna
First basic segment of bottom section 97 steel construction antennas is loaded in the concrete of building center; All the other basic segments are from bottom to top installed successively piecemeal; And pour into a mould with concrete at the periphery of bottom section steel construction antenna, form the basis of bottom section, and the top of bottom section steel construction antenna is exposed;
B), operation platform and lifting device are set
Above the basis of bottom section 97, build an operation platform 6 and lifting device is set, and the track 61 of mounting center is led in one of horizontal laying on operation platform 6;
C), the assembling of top section steel construction antenna
First basic segment of top section steel construction antenna is placed on the operation platform 6 in the lifting device, promote all the other basic segments from bottom to top segmentation installation successively, form holistic steel construction aerial head section 9 through manual work;
D), the installation of central section first basic segment
The central section of steel construction antenna is divided into several basic segments, the bracket 94 of encorbelmenting is set on steel construction aerial head section 9; The hoist cable 5 of lifting device is lock onto on the bracket 94 of encorbelmenting of steel construction aerial head section 9, be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 in the locking on the joist 2, unclamp down and be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3; Regulate wind resistance bar 12, make the top of adjusting rod 13 and the outer surface of steel construction aerial head section 9 keep a gap, make it the mounting center position that steel construction aerial head section 9 remains in lifting device; Start Hydraulic Station 8, hydraulic jack 4 work also drive annular piston 42 and go up joist 2 up, and last joist 2 stops to rise to the height of a basic segment that is higher than central section through hoist cable 5 drive steel construction aerial head sections 9 after; Adopt railcar central section first basic segment 91 to be delivered to the mounting center of operation platform 6; Primer fluid compressing cylinder 4 work also makes piston 42 and goes up joist 2 descending slightly, and last joist 2 is descending and be seated the top of central section first basic segment 91 together with the top section of steel construction antenna 9 through hoist cable 5, proofreaies and correct also and welds; At last; Locking down is located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3, unclamps the anchor sheet of being located on the joist 2 between anchor eye 22 and the hoist cable 57, and primer fluid compressing cylinder 4 also driven plunger 42 reaches that upward joist 2 is descending; Piston 42 resets, and waits for the installation of second basic segment;
E), the installation of central section second basic segment
Be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 in the locking on the joist 2; Unclamp down and be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3; Start Hydraulic Station 8; Hydraulic jack 4 work and driven plunger 42 and to go up joist 2 up, last joist 2 stop to rise to the height of a basic segment that is higher than central section through hoist cable 5 drive top sections 9 and central section first basic segment 91 after; Adopt railcar central section second basic segment 92 to be delivered to the mounting center of operation platform 6; Primer fluid compressing cylinder 4 work also makes piston 42 and goes up joist 2 descending slightly, and last joist 2 is descending and be seated the top of central section second basic segment 92 together with top section 9 and central section first basic segment 91 through hoist cable 5, proofreaies and correct also and welds; At last, locking is the anchor sheet 7 on the joist 3 down, unclamps the anchor sheet 7 on the joist 2, primer fluid compressing cylinder 4 and driven plunger 42 and upward joist 2 is descending, and piston 42 resets; The work of this step that circulates is installed, is welded and accomplish until all basic segment steel construction antenna of central section;
F), remove operation platform
Adopt lifting device that top section that connects as one 9 and central section are promoted slightly; Make it to break away from operation platform 6, remove track 61 and operation platform 6, again that top section 9 and central section is descending slightly; Make it to be seated on the steel construction antenna that bottom section exposes, and with its correction and welding.
Remove lifting device at last and the bracket 94 of encorbelmenting.
Consult Fig. 2; Lifting device of the present invention comprises derrick 1, last joist 2, following joist 3, hydraulic jack 4, hoist cable 5, anchor sheet 7 and Hydraulic Station 8; Said derrick 1 is divided into two-layer several wind resistance bars 12 that are provided with by the four prisms cylinder that the pole of four root posts 11 and several level and diagonal brace constitutes on the column 11, last joist 2, joist 3 is steel construction rectangle framework down; The framework center is that hole 21, hole 21 peripheries are arranged with several anchor eyes 22; Last joist 2 bottoms are provided with oil cylinder pedestal 23, and the framework of following joist 3 is provided with column pedestal 31, and hydraulic jack 4 is the circulus of single cylinder or multi-cylinder combination; Hydraulic jack 4 is made up of cylinder body 41 and piston 42, and cylinder body 41 is provided with the oily interface 43 of turnover; Hoist cable 5 is several.
Four root posts 11 of said derrick 1 are fixed on the basis; Following joist 3 remains with a height greater than basic segment between the basis; And the column pedestal 31 of following joist 3 is fixedly connected with four root posts 11 of derrick 1; The top that the cylinder body 41 of hydraulic jack 4 is located at derrick 1 is fixedly connected with column 11, and the oil cylinder pedestal 23 of last joist 2 is fixed on the piston 42 of hydraulic jack 4, and hoist cable 5 penetrates in the anchor eye 22 of joist 2 and following joist 3; Anchor sheet 7 is located between anchor eye 22 and the hoist cable 5 hoist cable 5 is locked or release, and said Hydraulic Station 8 is connected with the oily interface 43 of the turnover on the cylinder body 41 through oil pipe.
Consult Fig. 2, Fig. 3; Said wind resistance bar 12 is made up of pole socket body and adjusting rod 13; Wind resistance bar 12 four every layer; The below that two-layer wind resistance bar 12 is located at joist 2 on the derrick 1 respectively reaches the top of joist 3 down, and the pole socket body of wind resistance bar 12 is individually fixed on four root posts 11, and adjusting rod 13 points to mounting center; Described anchor eye 22 is a conical bore, the sheet that anchor sheet 7 cuts into for cone.
Embodiment
Consult Fig. 1, Fig. 3; Moisten A building, magnificent diamond top steel pipe antenna with Suzhou and be installed as example: at first the large-scale steel structure antenna is divided into top (211.68～239.6 m), middle part (191.38～211.68 m) and bottom (185.63～191.38 m) three sections by the absolute altitude position; The steel construction antenna of each section is made up of several basic segments, specifically may further comprise the steps:
A), the installation of bottom section steel construction antenna
5.75 m are divided into 3 basic segments with bottom section 97 steel construction antenna height overalls; According to this indexed plane figure location that civil engineering provides, first basic segment is loaded in the concrete of building center, and all the other basic segments are from bottom to top installed successively piecemeal; Absolute altitude after the installation is 191.38 m; Device for positioning and securing is set after the installation, and after the location correction, pours into a mould with concrete at the periphery of bottom section steel construction antenna; Form the basis of bottom section, and make the top of bottom section steel construction antenna expose center concrete 300 mm;
B), operation platform and lifting device are set
Above the basis of bottom section 97, build an operation platform 6 and lifting device is set, and the track 61 of mounting center is led in one of horizontal laying on operation platform 6;
C), the assembling of top section steel construction antenna
27.92 m are divided into 13 basic segments with top section steel construction antenna height overall; At first first basic segment places on the mounting center of the operation platform 6 in the lifting device; Through the manual work lifting all the other basic segments are from bottom to top implemented location, butt joint and welded and installed successively piecemeal, form holistic steel construction aerial head section 9;
D), the installation of central section first basic segment
20.30 m are divided into 10 basic segments with central section steel construction antenna height overall, and the bracket 94 of encorbelmenting is set on steel construction aerial head section 9; The hoist cable 5 of lifting device is lock onto on the bracket 94 of encorbelmenting of steel construction aerial head section 9, be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 in the locking on the joist 2, unclamp down and be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3; Regulate wind resistance bar 12, make the top of adjusting rod 13 and the outer surface of steel construction aerial head section 9 keep a gap, make it the mounting center position that steel construction aerial head section 9 remains in lifting device; Start Hydraulic Station 8, hydraulic jack 4 work also drive annular piston 42 and go up joist 2 up, and last joist 2 stops after rising to 2.5 m height through hoist cable 5 drive steel construction aerial head sections 9; Adopt railcar central section first basic segment 91 to be delivered to the mounting center of operation platform 6; Primer fluid compressing cylinder 4 work also makes piston 42 and goes up joist 2 descending slightly, and last joist 2 is descending and be seated the top of central section first basic segment 91 together with the top section of steel construction antenna 9 through hoist cable 5, proofreaies and correct also and welds; At last; Locking down is located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3, unclamps the anchor sheet of being located on the joist 2 between anchor eye 22 and the hoist cable 57, and primer fluid compressing cylinder 4 also driven plunger 42 reaches that upward joist 2 is descending; Piston 42 resets, and waits for the installation of second basic segment;
E), the installation of central section second basic segment
Be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 in the locking on the joist 2; Unclamp down and be located at the anchor sheet 7 between anchor eye 22 and the hoist cable 5 on the joist 3; Start Hydraulic Station 8; Hydraulic jack 4 work and driven plunger 42 and to go up joist 2 up, last joist 2 stops after rising to 2.5 m height through hoist cable 5 drive top sections 9 and central section first basic segment 91; Adopt railcar central section second basic segment 92 to be delivered to the mounting center of operation platform 6; Primer fluid compressing cylinder 4 work also makes piston 42 and goes up joist 2 descending slightly, and last joist 2 is descending and be seated the top of central section second basic segment 92 together with top section 9 and central section first basic segment 91 through hoist cable 5, proofreaies and correct also and welds; At last, locking is the anchor sheet 7 on the joist 3 down, unclamps the anchor sheet 7 on the joist 2, primer fluid compressing cylinder 4 and driven plunger 42 and upward joist 2 is descending, and piston 42 resets; The work of this step that circulates is installed, is welded and accomplish until all basic segment steel construction antenna of central section;
In the installation process of central section basic segment,, can implement moving down of one or many to the bracket 94 of encorbelmenting of top section 9 for keeping the stable lifting of steel construction antenna.
F), remove operation platform
Adopt lifting device that top section that connects as one 9 and central section are promoted slightly; Make it to break away from operation platform 6; Remove track 61 and operation platform 6, again that top section 9 and central section is descending slightly, make it to be seated on the steel construction antenna that bottom section exposes; And with its correction and welding, remove lifting device at last and the bracket 94 of encorbelmenting.
Claims (4)
1. the installation method of a large-scale steel structure antenna; It is characterized in that this method is: the large-scale steel structure antenna is divided into top, three sections in middle part and bottom by the absolute altitude position; The steel construction antenna of each section is made up of several basic segments, specifically may further comprise the steps:
A), the installation of bottom section steel construction antenna
First basic segment of bottom section steel construction antenna is loaded in the concrete of building center; From bottom to top the segmentation welding is fixing successively for all the other basic segments; Periphery forms the basis of bottom section steel construction antenna, and bottom section steel construction antenna is exposed with the concrete cast;
B), operation platform and lifting device are set
On the basis of bottom section steel construction antenna, build an operation platform and lifting device be set, and on operation platform track that leads to mounting center of horizontal laying;
C), the assembling of top section steel construction antenna
First basic segment of top section steel construction antenna is placed on the operation platform in the lifting device, promote all the other basic segments from bottom to top segmentation installation successively, form holistic top section steel construction antenna through manual work;
D), the installation of central section first basic segment
Stop after adopting lifting device top section steel construction antenna to be risen to the height of a basic segment that is higher than central section; First basic segment of central section steel construction antenna is delivered to the mounting center of operation platform with railcar; Make top section steel construction antenna descending and be seated the top of first basic segment of central section steel construction antenna through lifting device, proofread and correct also welding;
E), the installation of central section second basic segment
Stop after adopting lifting device top section steel construction antenna to be risen to the height of a basic segment that is higher than central section together with first basic segment of central section steel construction antenna; Second basic segment of central section steel construction antenna is delivered to the mounting center of operation platform with railcar; Make top section steel construction antenna descending and be seated the second basic segment top of central section steel construction antenna through lifting device, proofread and correct also welding together with first basic segment of central section steel construction antenna;
F), the installation of other basic segment of central section
Circulation step e), until all basic segment installations of central section steel construction antenna;
G), remove operation platform
Adopt lifting device that top section that connects as one and central section steel construction antenna are promoted; Make it to break away from operation platform, remove track and operation platform, again that top section and central section steel construction antenna is descending; Make it to be seated bottom section steel construction antenna exposed junction, proofread and correct and welding;
H), remove lifting device.
2. lifting device of implementing the said method of claim 1 is characterized in that it comprises derrick, goes up joist, joist, hydraulic jack, hoist cable, anchor sheet and Hydraulic Station down, and said derrick is the four prisms cylinder that is made up of the pole of four root posts and several level and diagonal brace; Column is provided with several wind resistance bars; Last joist, following joist are the rectangle framework, and the framework center is the hole, and the hole periphery is arranged with several anchor eyes; Last joist bottom is provided with the oil cylinder pedestal; The framework of following joist is provided with the column pedestal, and hydraulic jack is made up of cylinder body and piston, and cylinder body is provided with the oily interface of turnover; Hoist cable is several; Four root posts of said derrick are fixed on the basis; The column pedestal of following joist is fixedly connected with column; The top that the cylinder body of hydraulic jack is located at derrick is fixedly connected with column, and the oil cylinder pedestal of last joist is fixed on the piston of hydraulic jack, and hoist cable penetrates in the anchor eye of joist and following joist; The anchor sheet is located between anchor eye and the hoist cable, and Hydraulic Station is connected with the turnover oil interface of cylinder body through oil pipe.
3. lifting device according to claim 2 is characterized in that the wind resistance bar is made up of pole socket body and adjusting rod, is located at down between joist and the hydraulic jack, and the pole socket body is fixed on four root posts, adjusting rod indicator device center.
4. lifting device according to claim 2 is characterized in that the anchor eye is a conical bore, and the anchor sheet is the sheet that cone is cut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104254183A CN102496771B (en) | 2011-12-19 | 2011-12-19 | Method and device for installing large-sized steel structural antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104254183A CN102496771B (en) | 2011-12-19 | 2011-12-19 | Method and device for installing large-sized steel structural antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103682557A (en) * | 2013-11-27 | 2014-03-26 | 西安电子工程研究所 | Large phased array radar antenna frame structure and manufacturing method thereof |
| CN103818840A (en) * | 2014-02-10 | 2014-05-28 | 华为技术有限公司 | Hoisting part and hoisting method |
| CN104261283A (en) * | 2014-09-18 | 2015-01-07 | 中邮建技术有限公司 | Construction method of antenna hoisting device of wireless base station |
| CN106114754A (en) * | 2016-07-22 | 2016-11-16 | 中船澄西船舶（广州）有限公司 | Oil tanker repacks the method for FPSO into |
| CN106115474A (en) * | 2016-08-29 | 2016-11-16 | 共享钢构有限责任公司 | The method for improving of super high steel structure pylon |
| CN114873497A (en) * | 2022-05-24 | 2022-08-09 | 中国长江三峡集团有限公司 | Vertical lifting installation device and method for variable-diameter unbalanced load equipment |
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| US20050076608A1 (en) * | 2002-01-18 | 2005-04-14 | Matthew Russell | Methods and apparatus for forming and placing generally horizontal structures |
| CN1736848A (en) * | 2005-06-27 | 2006-02-22 | 华南理工大学 | Large-scale structure integral hositing device and method |
| CN101858149A (en) * | 2009-04-08 | 2010-10-13 | 上海市机械施工有限公司 | Large-sized steel structure integral translation and hoisting combination construction process |
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| US20050076608A1 (en) * | 2002-01-18 | 2005-04-14 | Matthew Russell | Methods and apparatus for forming and placing generally horizontal structures |
| CN1736848A (en) * | 2005-06-27 | 2006-02-22 | 华南理工大学 | Large-scale structure integral hositing device and method |
| CN101858149A (en) * | 2009-04-08 | 2010-10-13 | 上海市机械施工有限公司 | Large-sized steel structure integral translation and hoisting combination construction process |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682557A (en) * | 2013-11-27 | 2014-03-26 | 西安电子工程研究所 | Large phased array radar antenna frame structure and manufacturing method thereof |
| CN103682557B (en) * | 2013-11-27 | 2015-12-09 | 西安电子工程研究所 | A kind of Large Phased Array Radar Antenna frame structure and manufacture method |
| CN103818840A (en) * | 2014-02-10 | 2014-05-28 | 华为技术有限公司 | Hoisting part and hoisting method |
| CN103818840B (en) * | 2014-02-10 | 2016-11-09 | 华为技术有限公司 | A kind of lifting part and hanging method |
| CN104261283A (en) * | 2014-09-18 | 2015-01-07 | 中邮建技术有限公司 | Construction method of antenna hoisting device of wireless base station |
| CN104261283B (en) * | 2014-09-18 | 2016-01-06 | 中邮建技术有限公司 | A kind of construction method of antenna hanging apparatus of wireless base station |
| CN106114754A (en) * | 2016-07-22 | 2016-11-16 | 中船澄西船舶（广州）有限公司 | Oil tanker repacks the method for FPSO into |
| CN106114754B (en) * | 2016-07-22 | 2017-10-10 | 广州中船文冲船坞有限公司 | The method that oil tanker repacks FPSO into |
| CN106115474A (en) * | 2016-08-29 | 2016-11-16 | 共享钢构有限责任公司 | The method for improving of super high steel structure pylon |
| CN106115474B (en) * | 2016-08-29 | 2018-03-23 | 共享钢构有限责任公司 | The method for improving of super high steel structure pylon |
| CN114873497A (en) * | 2022-05-24 | 2022-08-09 | 中国长江三峡集团有限公司 | Vertical lifting installation device and method for variable-diameter unbalanced load equipment |
| CN114873497B (en) * | 2022-05-24 | 2023-06-16 | 中国长江三峡集团有限公司 | Vertical lifting installation device and method for variable-diameter unbalanced load equipment |
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|---|---|
| CN102496771B (en) | 2013-11-06 |
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