CN100544216C - A kind of radio-frequency module, outlet port sealing elastomer and base station - Google Patents
A kind of radio-frequency module, outlet port sealing elastomer and base station Download PDFInfo
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- CN100544216C CN100544216C CNB2007101007101A CN200710100710A CN100544216C CN 100544216 C CN100544216 C CN 100544216C CN B2007101007101 A CNB2007101007101 A CN B2007101007101A CN 200710100710 A CN200710100710 A CN 200710100710A CN 100544216 C CN100544216 C CN 100544216C
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- sealing elastomer
- outlet port
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- waterproof
- goes out
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Abstract
The present invention relates to communication equipment, particularly a kind of radio-frequency module, outlet port sealing elastomer and base station are in order to solve the problem of existing radio-frequency module outlet port sealing elastomer sealing effectiveness difference.The embodiment of the invention goes out two waterproof seamed edges are set in the wire casing at least at the cable of outlet port sealing elastomer, and two parts cable waterproof seamed edge of going out the wire casing port position is interspersed up and down.Like this, after first sealing elastomer and the assembling of second sealing elastomer, form the besieged city labyrinth structure, being interspersed of waterproof seamed edge can make the waterproof seamed edge freely compress in compression process, the wedge angle position produces stress and has the slit when preventing that elastomer from cooperating up and down, has improved sealing effectiveness.
Description
Technical field
The present invention relates to communication equipment, particularly a kind of radio-frequency module, outlet port sealing elastomer and base station.
Background technology
ODU (Out Door Unit, outdoor unit) as a kind of outdoor little base station of type of zooming out that solves the machine room problem, need have very strong environmental suitability, therefore require modularized design, compact in design, volume little in light weight on its inner radio-frequency module structure, it is convenient, flexible, quick to install requirement, applicability to installation environment is strong, and can realize the IP55 protection.
ODU is more extensive at the outdoor mounted environment, in outdoor macro base station, need simultaneously the parallel installation of a plurality of ODU, this has good installability with regard to needing its inner radio-frequency module, yet the cabling of radio-frequency module is generally all many, will well realize the IP55 protection in limited space, difficulty is very big.
As shown in Figure 1, external structure schematic diagram for existing radio-frequency module 100, comprise: be arranged on second wire cavity lid 122 of first wire cavity lid, 121, second wire cavity 112 of first wire cavity 111 on the casing and second wire cavity 112, first wire cavity 111 and the screw 140 of a plurality of fastening wire cavity and wire cavity lid, wherein: first wire cavity 111 and first wire cavity cover 121 fixedlys connected the back and forms first line outlet, 131, the second wire cavities 112 and second wire cavity at the outlet position and cover 122 and fixedly connected the back and form second line outlet 132 at the outlet position.
For satisfying outdoor requirement of shelter, first line outlet 131 and second line outlet, 132 inboards are respectively arranged with the sealing elastomer of waterproof, with second line outlet is example, as shown in Figure 2, outlet port sealing elastomer comprises first sealing elastomer 151 and second sealing elastomer 152, each sealing elastomer comprises at least one semicircle cable outlet groove, cable goes out wire casing and forms at the bottom of by both sides waterproof seamed edge and semi-circular groove, the waterproof seamed edge butt joint back of first sealing elastomer 151 and second sealing elastomer 152 forms the cable wire hole, wire hole quantity becomes with the cable number of outgoing, the wire hole diameter is slightly less than cable diameter, after sealing elastomer is fastened, wire hole is strain with the cable diameter size, and the sealing elastomer inwall closely contacts the formation waterproof with the cable outer wall.The raising of waterproof reliability is usually satisfied by the quantity that increases trip bolt 140.
Still consult shown in Figure 2, be fixing trip bolt 140, need for each trip bolt 140 the screw hole position to be set in the online chamber, be provided with on sealing elastomer that the screw hole position need be covered at wire cavity, wire cavity covers sidewall and the wire cavity, Figure 2 shows that the screw hole position 141 that is provided with on the sealing elastomer of a sidewall of wire cavity lid.
The present inventor finds, two sealing elastomers of line outlet the waterproof seamed edge of cable outlet groove port over against, produce dislocation because of stressed in the fastening process easily, influence the sealing effectiveness of sealing elastomer to cable.The wedge angle of two sealing elastomer waterproof seamed edge matching parts is easy to generate the slit because of wedge angle stress in compression process, also can influence sealing effectiveness to cable, only both sides waterproof seamed edge is easy to generate under the water spray environment of IPX5 and leaks, cable footpath itself can not guarantee it is the circle of standard in addition, cause to the line footpath not the Seal of Cables effect of rounding be affected.
Summary of the invention
The invention provides a kind of radio-frequency module, outlet port sealing elastomer and base station, in order to solve the problem of existing radio-frequency module outlet port sealing elastomer sealing effectiveness difference.
A kind of radio-frequency module, comprise wire cavity and wire cavity lid, be provided with first outlet port sealing elastomer in the line outlet of described wire cavity, be provided with second outlet port sealing elastomer in the line outlet of described wire cavity lid, described first outlet port sealing elastomer and second outlet port sealing elastomer comprise that respectively the corresponding cable that is provided with goes out wire casing; Wherein:
Each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and the described first outlet port sealing elastomer cable goes out the waterproof seamed edge of wire casing port and waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port is interspersed.
Further, the first outlet port sealing elastomer cable each bar waterproof seamed edge of going out the wire casing port all is distributed in the second outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port; Perhaps the second outlet port sealing elastomer body cable each bar waterproof seamed edge of going out the wire casing port all is distributed in the first outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port.
The embodiment of the invention also provides a kind of base station, comprise radio-frequency module, described radio-frequency module comprises wire cavity and wire cavity lid, be provided with first outlet port sealing elastomer in the line outlet of described wire cavity, be provided with second outlet port sealing elastomer in the line outlet of described wire cavity lid, described first outlet port sealing elastomer and second outlet port sealing elastomer comprise that respectively the corresponding cable that is provided with goes out wire casing; Wherein:
Each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and the described first outlet port sealing elastomer cable goes out the waterproof seamed edge of wire casing port and waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port is interspersed.
The embodiment of the invention goes out two waterproof seamed edges are set in the wire casing at least at the cable of outlet port sealing elastomer, and two parts cable waterproof seamed edge of going out the wire casing port position is interspersed up and down.Like this, after the sealing elastomer assembling, form the besieged city labyrinth structure, being interspersed of waterproof seamed edge can make the waterproof seamed edge freely compress in compression process, the wedge angle position produces stress and has the slit when preventing that elastomer from cooperating up and down, can also to the line footpath not the cable of rounding play good sealing function; Further allow bottom waterproof seamed edge encase top waterproof seamed edge fully, be between all adjacent two the bottom waterproof seamed edges of each bar waterproof seamed edge on top, can increase the filling of sealing elastomer to the cable peripheral space, make its cooperation tightr, sealing effectiveness is better; And, can improve the sealing reliability of radio-frequency module at line outlet by increasing waterproof seamed edge quantity.
Description of drawings
Fig. 1 is the external structure schematic diagram of existing radio-frequency module 100;
Fig. 2 is the sealing elastomer structural representation of existing radio-frequency module line outlet;
The external structure schematic diagram of a kind of radio-frequency module 300 that Fig. 3 provides for the embodiment of the invention;
Fig. 4, Fig. 5 and Fig. 6 are respectively the primary structure schematic diagram of the described fastener of the embodiment of the invention;
Cross-sectional view between radio-frequency module wire cavity that Fig. 7 provides for the embodiment of the invention and the wire cavity lid;
The structural representation of the radio-frequency module wire cavity side line outlet that Fig. 8 embodiment of the invention provides;
The staggered waterproof seamed edge type sealing elastomer structural representation of the radio-frequency module line outlet that Fig. 9, Figure 10 and Figure 11 provide for the embodiment of the invention;
Another wire cavity lid fastening means principle schematic that Figure 12 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention for solving in the existing radio-frequency module structure since adopt a plurality of trip bolts fixedly wire cavity cover the installation challenge that causes, adopt the lever mode to connect first wire cavity lid and second wire cavity lid, the centre can only adopt a screw fastening.
As shown in Figure 3, the external structure schematic diagram of the radio-frequency module 300 that provides for the embodiment of the invention comprises:
First wire cavity lid, 321 and second wire cavity lid 322, wherein: first wire cavity lid 321 is fixedlyed connected the back and is formed first line outlet, 331, the second wire cavities lid 322 and fixedly connected the back with second wire cavity 312 and form second line outlet 332 with first wire cavity 311;
Lever and fastening assembly, lever connect the outer surface of first wire cavity lid, 321 and second wire cavity lid 322 respectively, fixedly connected with casing by fastening assembly in the centre, thereby two wire cavities lids are pressed to respectively on the corresponding wire cavity.
Consult Fig. 4 and shown in Figure 5, the concrete structure for a kind of lever and fastening assembly comprises:
First wire cavity lid 321 is provided with first wire cavity lid flange, 344, the second wire cavities and covers and be provided with second wire cavity lid flange 345, wherein:
First wire cavity lid flange 344 and second wire cavity lid flange 345 are installed with pin (3441,3451) respectively, one end of lever 341 is connected with the pin 3441 formation hinges that first wire cavity covers on the flange 344, and the other end is connected with the pin 3451 formation hinges that second wire cavity covers on the flange 345.
The hinges connected mode is consulted shown in Figure 6, and pilot hole 3412 and wire cavity lid flange that pin passes on the lever flexibly connect, and the wire cavity lid can be around pin to lever inboard or outside upset; Pilot hole 3412 can be that through hole also can be a screw etc.
The also all right fixedly connected wire cavity exterior surface of lever, fixedly connected mode is not limited to welding, riveted joint, screw connection etc.The screw number of truck dead lever also is not limited to one.
After screw 342 passes the perforate that is arranged on lever 341 middle parts, be screwed on the screw 343, deform after lever 341 is tightened, two ends produce downward pressure respectively, and first wire cavity lid, 321 and first wire cavity lid 311 is pressed to respectively on first wire cavity 311 and second wire cavity 312.
Can see, the lever compressing structure not only provides enough pressure for the installation between wire cavity lid and the wire cavity, and can finish whole installment works that two wire cavities cover by a screw, reduce the on-the-spot installation difficulty of radio-frequency module and the installation reliability risk that may cause, reduced the quantity of screw in the product installation process.
After adopting the lever compressing structure, do not need in the wire cavity screw hole position is set, increased the operating space of wire cavity, promote the installability and the maintainability of product.
First wire cavity lid flange 344 and second wire cavity lid flange 345 are separately positioned on the middle part of wire cavity lid, and to guarantee that thrust is evenly distributed to wire cavity and covers, the height of flange can be decided according to the structure needs.The shape of lever 341 can design according to the structure needs, as long as satisfy lever principle, the flange shape of same wire cavity lid also can design according to the structure needs, as long as can reach the strength of carrying lever transmission.If the height of two wire cavities lid is inconsistent, can adjust by flange height or lever shape that wire cavity covers face.
Fastening means can compare flexibly, and screw is fastening only to be wherein a kind of, as long as reach fastening purpose, generally makes pine if the employing screw is fastening and does not take off formula with convenient installation.
Referring to shown in Figure 4, in order to prevent that first wire cavity lid, 321 and second wire cavity lid 322 freely overturns and wayward around pin in the installation process, for stoping upset, the two ends of lever 341 can prolong a minor face respectively, play the effect of baffle plate.
Still consult shown in Figure 4, if the height of first wire cavity lid flange 344 and second wire cavity lid flange 345 is inconsistent, then at the higher end of flange, can not play good anti-canting effect by prolonging lever 341 1 ends, at this moment, can obtain better anti-canting effect by at the higher end of flange catch being set at lever 341.
Shown in Figure 6, be a kind of lever 341 structural representations that are provided with catch 3411 that the embodiment of the invention provides, catch 3411 is arranged on first wire cavity and covers 321 1 sides, is used to prevent that first wire cavity lid 321 from bringing inconvenience to installation around pin upset back.
Referring to shown in Figure 6, the structure of catch 3411 can be that prolongation lever 341 is formed after twice bending, this catch is parallel with lever 341, catch length and cover vertical range between 321 surfaces according to preventing that the commentaries on classics desirability decide apart from first wire cavity can well stop first wire cavity lid 321 to overturn to the lever outside.
The structure of catch can also be to form behind acute angle of the downward bending of an end of lever 341, and catch also can be an independent structure member of fixedlying connected with lever 341, and connected mode is not limited to welding, riveted joint or screw connection etc.
The embodiment of the invention is also covered except that the sidewall that line outlet is set at wire cavity, all the other each sidewall bottoms are provided with bilateral limited step, distance between the bilateral limited step inwall is greater than the thickness of wire cavity respective side walls, peripheral sealing elastomer is installed in the bilateral limited step, and the installation of wire cavity lid played good guiding and position-limiting action, help the installation of peripheral sealing elastomer and spacing, good dash effect can also be played in the limited step outer, has improved the waterproof reliability.
As shown in Figure 7, be the cross-sectional view between first wire cavity lid, 321 and first wire cavity 311, between first wire cavity lid, 321 and first wire cavity 311 wire cavity periphery sealing elastomer 351.Syndeton between second wire cavity lid, 322 and second wire cavity 312 is identical.
The cross section of periphery sealing elastomer 351 is convex, and boss is promptly convenient to be installed and change, and sealing effectiveness is improved in needed space in the time of can making both sides leave stress deformation again.
For reliability and the convenience that improves fitting operation, the embodiment of the invention also is provided with inside and outside double-deck latch at line outlet, at least one cable draw-in groove is set on the latch, cable draw-in groove width is slightly less than the cable diameter of being passed through, the outlet port sealing elastomer and the wire cavity lid that so both can give between the outlet latch are well spacing, to ensure the reliable of waterproof, simultaneously also make things convenient for the site operation personnel to operate, cable is played good guide effect, only cable need be placed in the cable clamping interface during installation and get final product, can not come off, with convenient follow-up installation to the wire cavity lid, this kind design can also prevent module after installing in addition, and cable causes the influence to the module protection effect when being subjected to outside torsion.Wherein: latch quantity becomes with cabling quantity, and the draw-in groove spacing changes with cable size.
As shown in Figure 8, the structure of thinking second line outlet 332 is an example, and latch 3321 and outer latch 3322 in second line outlet 332 comprises form the cell body that line outlet second sealing elastomer 352 is installed between interior latch 3321 and the outer latch 3322.
For solving the waterproof problem of line outlet, the embodiment of the invention also provides a kind of labyrinth, besieged city outlet port sealing elastomer of staggered waterproof seamed edge type of full encirclement formula, as shown in Figure 9, be the structural representation of second sealing elastomer 352 in the wire cavity side line outlet, in the cell body in second sealing elastomer 352 is installed between latch 3321 and the outer latch 3322.As shown in figure 10, be the structural representation of first sealing elastomer 353 in the wire cavity lid side line outlet draw-in groove, first sealing elastomer 353 is installed on the line outlet of wire cavity lid.As shown in figure 11, for after wire cavity lid is assembled on the wire cavity, assembly relation schematic diagram between second sealing elastomer 352 and first sealing elastomer 353.Wherein, the peripheral sealing elastomer 351 and first sealing elastomer 353 are generally integrative-structure.
Two parts up and down of outlet port sealing elastomer comprise and comprise that respectively the corresponding cable that is provided with goes out wire casing, and each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and two parts cable waterproof seamed edge of going out the wire casing port position is interspersed up and down.Like this, after first sealing elastomer and the assembling of second sealing elastomer, form the besieged city labyrinth structure, being interspersed of waterproof seamed edge can make the waterproof seamed edge freely compress in compression process, the wedge angle position produces stress and has the slit when preventing that elastomer from cooperating up and down, can also to the line footpath not the cable of rounding play good sealing function; Allow bottom waterproof seamed edge encase top waterproof seamed edge fully, promptly between all adjacent two the bottom waterproof seamed edges of each bar waterproof seamed edge on top, can increase the filling of sealing elastomer, make its sealing effectiveness better, cooperate tightr the cable peripheral space; And increase waterproof seamed edge quantity, can improve the sealing reliability of radio-frequency module at line outlet.Certainly, also can make top waterproof seamed edge encase bottom waterproof seamed edge fully.
As shown in figure 12, the embodiment of the invention also provides a kind of wire cavity lid fastening means of radio-frequency module based on lever principle, wire cavity is covered 401 bottom surfaces as lever, cover middle part, 401 bottom surfaces at wire cavity pilot hole is set, screw 402 is fixedly attached to wire cavity on the casing with the screw cooperation that is arranged on the casing after passing pilot hole, and the even stressed back of four sidewalls of wire cavity lid 401 is fastenedly connected with wire cavity.Pilot hole can be that through hole also can be a screwed hole etc.
Screw 402 and screw form the fastening assembly of wire cavity lid, and fastening assembly also can be selected bolt and nut certainly, are bolted on the casing, and pass after the perforate at wire cavity lid middle part to cooperate with nut wire cavity covered and be fixedly attached on the casing.
Wire cavity lid fastening means as shown in figure 12 can be applied to first wire cavity lid separately or second wire cavity covers, and also first wire cavity lid and second wire cavity lid can be merged into a wire cavity lid, is undertaken fastening by a screw then.Fixedly the screw number of wire cavity lid also is not limited to one.
The embodiment of the invention also provides a kind of ODU, and this ODU comprises one and the described radio-frequency module of the above embodiment of the invention.
In sum, in the radio-frequency module structure that the embodiment of the invention provides, the cable of outlet port sealing elastomer goes out to comprise two waterproof seamed edges in the wire casing at least, and two parts cable waterproof seamed edge of going out the wire casing port position is interspersed up and down.Like this, after the outlet port sealing elastomer assembling, form the besieged city labyrinth structure, being interspersed of waterproof seamed edge can make the waterproof seamed edge freely compress in compression process, the wedge angle position produces stress and has the slit when preventing that elastomer from cooperating up and down, can also to the line footpath not the cable of rounding play good sealing function; Allow bottom waterproof seamed edge encase top waterproof seamed edge fully, promptly between all adjacent two the bottom waterproof seamed edges of each bar waterproof seamed edge on top, can increase the filling of sealing elastomer, make its sealing effectiveness better the cable peripheral space.Peripheral sealing elastomer is installed in the bilateral limited step, is helped the installation of peripheral sealing elastomer and spacing, good dash effect can also be played in the limited step outer, has improved the waterproof reliability.The cross section of periphery sealing elastomer is convex, and sealing effectiveness is improved in needed space in the time of can making both sides leave stress deformation.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1, a kind of radio-frequency module, comprise wire cavity and wire cavity lid, be provided with first outlet port sealing elastomer in the line outlet of described wire cavity, be provided with second outlet port sealing elastomer in the line outlet of described wire cavity lid, described first outlet port sealing elastomer and second outlet port sealing elastomer comprise that respectively the corresponding cable that is provided with goes out wire casing; It is characterized in that:
Each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and the described first outlet port sealing elastomer cable goes out the waterproof seamed edge of wire casing port and waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port is interspersed.
2, radio-frequency module as claimed in claim 1 is characterized in that:
Each bar waterproof seamed edge that the first outlet port sealing elastomer cable goes out the wire casing port all is distributed in the second outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port; Perhaps
Each bar waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port all is distributed in the first outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port.
3, radio-frequency module as claimed in claim 1 or 2 is characterized in that:
Described wire cavity lid is except that the sidewall that described first line outlet is set, all the other each sidewall bottoms are provided with bilateral limited step, distance between the described bilateral limited step inwall is provided with the 3rd sealing elastomer greater than the thickness of wire cavity respective side walls in the described bilateral limited step.
4, radio-frequency module as claimed in claim 3 is characterized in that, the cross section of described the 3rd sealing elastomer is convex.
5, radio-frequency module as claimed in claim 1 is characterized in that, described cable goes out the quantity of wire casing and determines that according to the cable number of outgoing it is the semicircle that diameter is slightly less than cable diameter that described cable goes out wire casing.
6, a kind of outlet port sealing elastomer comprises first outlet port sealing elastomer and second outlet port sealing elastomer, and described first outlet port sealing elastomer and second outlet port sealing elastomer comprise that respectively the corresponding cable that is provided with goes out wire casing; It is characterized in that:
Each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and the described first outlet port sealing elastomer cable goes out the waterproof seamed edge of wire casing port and waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port is interspersed.
7, sealing elastomer as claimed in claim 6 is characterized in that:
Each bar waterproof seamed edge that the first outlet port sealing elastomer cable goes out the wire casing port all is distributed in the second outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port; Perhaps
Each bar waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port all is distributed in the first outlet port sealing elastomer cable and goes out between two adjacent waterproof seamed edges of wire casing port.
8, sealing elastomer as claimed in claim 6 is characterized in that, described cable goes out the quantity of wire casing and determines that according to the cable number of outgoing it is the semicircle that diameter is slightly less than cable diameter that described cable goes out wire casing.
9, a kind of base station, comprise radio-frequency module, described radio-frequency module comprises wire cavity and wire cavity lid, be provided with first outlet port sealing elastomer in the line outlet of described wire cavity, be provided with second outlet port sealing elastomer in the line outlet of described wire cavity lid, described first outlet port sealing elastomer and second outlet port sealing elastomer comprise that respectively the corresponding cable that is provided with goes out wire casing; It is characterized in that:
Each cable goes out to comprise two waterproof seamed edges in the wire casing at least, and the described first outlet port sealing elastomer cable goes out the waterproof seamed edge of wire casing port and waterproof seamed edge that the second outlet port sealing elastomer cable goes out the wire casing port is interspersed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101007101A CN100544216C (en) | 2007-04-16 | 2007-04-16 | A kind of radio-frequency module, outlet port sealing elastomer and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101007101A CN100544216C (en) | 2007-04-16 | 2007-04-16 | A kind of radio-frequency module, outlet port sealing elastomer and base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101047397A CN101047397A (en) | 2007-10-03 |
| CN100544216C true CN100544216C (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101007101A Expired - Fee Related CN100544216C (en) | 2007-04-16 | 2007-04-16 | A kind of radio-frequency module, outlet port sealing elastomer and base station |
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| CN (1) | CN100544216C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378935B (en) * | 2013-08-13 | 2018-05-11 | 华为技术有限公司 | A kind of locking device of wire cavity cover plate |
| CN204046987U (en) * | 2014-06-30 | 2014-12-24 | 华为技术有限公司 | Radio-frequency module waterproof construction and there is the radio-frequency module of this radio-frequency module waterproof construction |
| CN105101718B (en) * | 2015-06-18 | 2018-10-09 | 华为技术有限公司 | A kind of cable seal box |
| CN111432584B (en) * | 2020-03-27 | 2020-12-22 | 深圳市泰士特科技股份有限公司 | Combined wiring connection tray device |
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2007
- 2007-04-16 CN CNB2007101007101A patent/CN100544216C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101047397A (en) | 2007-10-03 |
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