CN110244089A - A kind of portable electric energy meter - Google Patents
A kind of portable electric energy meter Download PDFInfo
- Publication number
- CN110244089A CN110244089A CN201910544701.4A CN201910544701A CN110244089A CN 110244089 A CN110244089 A CN 110244089A CN 201910544701 A CN201910544701 A CN 201910544701A CN 110244089 A CN110244089 A CN 110244089A
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- China
- Prior art keywords
- electric energy
- energy meter
- fixedly connected
- sleeve
- ontology
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention discloses a kind of portable electric energy meters, including electric energy meter ontology, the two sides of the electric energy meter ontology are fixedly connected to fixed cylinder, the surface of the fixed cylinder is socketed with support sleeve, handle is provided at the top of the electric energy meter ontology, the both ends of the handle bottom are fixedly connected on the surface of support sleeve, and the top of the electric energy meter ontology is hinged with protective jacket by pin shaft.The present invention is protected by the surface that protective jacket drives rubber sleeve to be pressed on electric energy meter ontology, position is carried out to protective jacket by positioning sleeve and square set by fixed mechanism again to fix, to have can be to being protected at the operation panel of electric energy meter the advantages of, it solves and does not have certain protection mechanism at the operation panel of existing portable electric meter, to when not in use, the inside that dust and water droplet are easy to drop down onto cabinet by the gap of key impacts element, a degree of the problem of reducing electric energy meter service life.
Description
Technical field
The present invention relates to electric energy meter technical field, specially a kind of portable electric energy meter.
Background technique
Electric energy meter is the instrument for measuring electric energy, also known as kilowatt-hour meter, energy meter, kilowatt-hour table, refers to the various electricity of measurement
It should be noted that when the instrument of amount is using electric energy meter in the case where low-voltage and low current, electric energy meter can be directly accessed circuit progress
Measurement, in the case where high voltage or high current, electric energy meter cannot directly access route, and voltage transformer or electric current need to be cooperated mutual
Sensor uses.
Electric energy meter is that electrician is daily essential using tool, and portable electric meter is then common one in electric energy meter
Kind, but do not have certain protection mechanism at the operation panel of existing portable electric meter, thus when not in use, dust and water
The inside that drop is easy to drop down onto cabinet by the gap of key impacts element, a degree of use for reducing electric energy meter
Service life is not easy to people's use.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of portable electric energy meter, having can be to electric energy
The advantages of being protected at the operation panel of table, solve do not have at the operation panel of existing portable electric meter it is certain anti-
Mechanism is protected, thus when not in use, shadow is caused to element in the inside that dust and water droplet are easy to drop down onto cabinet by the gap of key
It rings, a degree of the problem of reducing electric energy meter service life.
(2) technical solution
In order to achieve the above object, the invention provides the following technical scheme: a kind of portable electric energy meter, including electric energy
Table ontology, the two sides of the electric energy meter ontology are fixedly connected to fixed cylinder, and the surface of the fixed cylinder is socketed with support sleeve, institute
It states and is provided with handle at the top of electric energy meter ontology, the both ends of the handle bottom are fixedly connected on the surface of support sleeve, described
The top of electric energy meter ontology is hinged with protective jacket by pin shaft, and the bottom of the protective jacket is fixedly connected with rubber sleeve, described anti-
The front of sheath is fixedly connected with square set, and the positive top of electric energy meter ontology is fixedly connected with positioning sleeve, the square set
Bottom passes through positioning sleeve and extends to the bottom of positioning sleeve.
Preferably, the positioning sleeve is internally provided with fixed mechanism, and the fixed mechanism includes pull ring, pull rod, baffle
With spring one, the barrier slides are connected to the inside of positioning sleeve, and the front side of positioning sleeve is arranged in the pull ring, and the pull rod is solid
Surely it is connected to the back side of pull ring, the rear end of the pull rod is through to the inside of positioning sleeve and is fixedly connected on the front of baffle, institute
State the surface that spring one is set in pull rod, the rear end of the spring one is fixedly connected on the surface of baffle, before the spring one
End is fixedly connected on the inside of positioning sleeve.
Preferably, limited position mechanism is arranged in the surface of the fixed cylinder, and the position-limit mechanism includes connector sleeve, square plate, card
Bar and through-hole, the connector sleeve are set in side of the fixed cylinder surface far from electric energy meter ontology, and the square plate is fixedly connected on company
The inside of female connector, the square plate are through to the inside of fixed cylinder close to one end of electric energy meter ontology, and the kelly is fixedly connected on
Connector sleeve is close to the side of electric energy meter ontology, and the through-hole opens up the surface of support sleeve, and the kelly is close to electric energy meter ontology
One end passes through through-hole and extends to the outside of support sleeve.
Preferably, the square plate is fixedly connected with limit plate close to one end of electric energy meter ontology, and the limit plate sliding connects
It connects in the inside of fixed cylinder, the limit plate is fixedly connected with spring two far from the side of electric energy meter ontology, the spring two
Right end is fixedly connected on the inside of fixed cylinder, and the shape of the limit plate surface and the shape of fixed cylinder inner wall are rectangular.
Preferably, the surface of the fixed cylinder is fixedly connected with the reinforcing sleeve on the inside of support sleeve, the reinforcing sleeve
Left side offers connecting hole, and the reinforcing sleeve is socketed in the surface of kelly by connecting hole.
Preferably, the bottom of electric energy meter ontology two sides is provided with drier, and the drier includes sealing
Cylinder, dry screen drum and T-bar, in the bottom of electric energy meter ontology two sides, the T-bar is threaded in close for the sealing drum connection
The inside of sealed tube, the dry screen drum are fixedly connected on T-bar close to the side of electric energy meter ontology.
Preferably, the T-bar is fixedly connected with fanning strip, the surface of the T shape bar far from the side of electric energy meter ontology
It is socketed with the elastic seal ring being located on the outside of sealing drum.
Preferably, the two sides of the electric energy meter body bottom portion are fixedly connected to backing plate, and the surface of the backing plate is fixed to be connected
It is connected to rubber pad.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of portable electric energy meter, have it is following the utility model has the advantages that
1, the portable electric energy meter is prevented by the surface that protective jacket drives rubber sleeve to be pressed on electric energy meter ontology
Shield, then position is carried out to protective jacket by positioning sleeve and square set by fixed mechanism and is fixed, it can be to electric energy meter to have
The advantages of being protected at operation panel solves and does not have certain protection machine at the operation panel of existing portable electric meter
Structure, thus when not in use, the inside that dust and water droplet are easy to drop down onto cabinet by the gap of key impacts element, and one
Determine the problem of reducing electric energy meter service life of degree, is used convenient for people.
2, the portable electric energy meter, spring one are set in the surface of pull rod, and the rear end of spring one is fixedly connected on gear
The front end on the surface of plate, spring one is fixedly connected on the inside of positioning sleeve, by setting baffle and spring one, can to pull rod into
Row limit, avoids the phenomenon that pull rod shakes when not in use, improves the stability of pull rod.
3, the portable electric energy meter can pull square plate convenient for user, simultaneously by the way that connector sleeve is arranged
Compared with being fixed setting with the handle of existing electric energy meter, it is solid which can carry out position to the handle of different angle
It is fixed, consequently facilitating being supported to electric energy meter ontology, make electric energy meter ontology is in different angles to be placed on ground, convenient for user into
Row observation.
4, the portable electric energy meter, the shape of the shape and fixed cylinder inner wall that limit plate surface be it is rectangular, pass through
Limit plate is set, square plate can be limited, avoids square plate and the phenomenon that being detached from fixed cylinder occurs, while improving square plate
Stability.
5, the portable electric energy meter, the surface of fixed cylinder are fixedly connected with the reinforcing sleeve on the inside of support sleeve, add
The left side covered by force offers connecting hole, by setting reinforcing sleeve and connecting hole, can limit to kelly, avoid kelly with
The phenomenon that junction of connector sleeve is easy to appear damage improves the service life of kelly.
6, the portable electric energy meter, by setting T-bar and sealing drum, can convenient for user to dry screen drum into
Row replacement, while not having compared with certain anti-moisture mechanism for electric with existing electric energy meter, which can be to electric energy meter ontology
Internal air is dried, and avoids humid air and is easy to impact the element of electric energy meter body interior for a long time
The phenomenon that.
7, the portable electric energy meter, the surface of T-bar are socketed with the elastic seal ring on the outside of sealing drum, pass through
Elastic seal ring is set, T-bar can be pushed by own resilient, be avoided T shape bar and be easy to appear showing for revolution
As improving the stability of T-bar.
8, the portable electric energy meter, the two sides of electric energy meter body bottom portion are fixedly connected to backing plate, the surface of backing plate
It is fixedly connected with rubber pad, by setting backing plate and rubber pad, a degree of guarantor can be carried out to the bottom of electric energy meter ontology
Shield avoids the bottom of electric energy meter ontology and the phenomenon that object directly collides.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is the left view sectional view of structure of the invention protective jacket;
Fig. 3 is the enlarged diagram in Fig. 1 at A;
Fig. 4 is the enlarged diagram in Fig. 1 at B;
Fig. 5 is the enlarged diagram in Fig. 2 at C;
Fig. 6 is the stereoscopic schematic diagram of structure of the invention baffle.
In figure: 1 electric energy meter ontology, 2 fixed cylinders, 3 support sleeves, 4 handles, 5 protective jackets, 6 rubber sleeves, 7 square sets, 8 positioning
Set, 9 fixed mechanisms, 91 pull rings, 92 pull rods, 93 baffles, 94 springs one, 10 position-limit mechanisms, 101 connector sleeves, 102 square plates, 103
Kelly, 104 through-holes, 11 limit plates, 12 springs two, 13 reinforcing sleeves, 14 connecting holes, 15 driers, 151 sealing drums, 152 dryings
Screen drum, 153T shape bar, 16 fanning strips, 17 elastic seal rings, 18 backing plates, 19 rubber pads.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is equal to please refer to Fig. 1-6, a kind of portable electric energy meter, including electric energy meter ontology 1, the two sides of electric energy meter ontology 1
It is fixedly connected with fixed cylinder 2, the surface of fixed cylinder 2 is socketed with support sleeve 3, and the top of electric energy meter ontology 1 is provided with handle 4,
The both ends of 4 bottom of hand are fixedly connected on the surface of support sleeve 3, and limited position mechanism 10, position-limit mechanism is arranged in the surface of fixed cylinder 2
10 include connector sleeve 101, square plate 102, kelly 103 and through-hole 104, and connector sleeve 101 is set in 2 surface of fixed cylinder far from electric energy meter
The side of ontology 1, square plate 102 are fixedly connected on the inside of connector sleeve 101, and square plate 102 runs through close to one end of electric energy meter ontology 1
To the inside of fixed cylinder 2, kelly 103 is fixedly connected on connector sleeve 101 close to the side of electric energy meter ontology 1, and through-hole 104 opens up branch
The surface of support set 3, kelly 103 pass through through-hole 104 close to one end of electric energy meter ontology 1 and extend to the outside of support sleeve 3, such as scheme
3, by the way that connector sleeve 101 is arranged, square plate 102 can be pulled convenient for user, while being with the handle of existing electric energy meter 4
Fixed setting compares, the position-limit mechanism 10 can handle 4 to different angle carry out position and fix, consequently facilitating to electric energy meter
Ontology 1 is supported, and is made electric energy meter ontology 1 is in different angles to be placed on ground, is observed convenient for user, and square plate 102 is leaned on
One end of nearly electric energy meter ontology 1 is fixedly connected with limit plate 11, and limit plate 11 is slidably connected at the inside of fixed cylinder 2, limit plate
11 sides far from electric energy meter ontology 1 are fixedly connected with spring 2 12, and the right end of spring 2 12 is fixedly connected on the interior of fixed cylinder 2
Portion, the shape on 11 surface of limit plate and the shape of 2 inner wall of fixed cylinder be it is rectangular,, can by the way that limit plate 11 is arranged such as Fig. 3
Square plate 102 is limited, square plate 102 is avoided and the phenomenon that being detached from fixed cylinder 2 occurs, while improving the stabilization of square plate 102
Property, the surface of fixed cylinder 2 is fixedly connected with the reinforcing sleeve 13 positioned at the inside of support sleeve 3, and the left side of reinforcing sleeve 13 offers connection
Hole 14, reinforcing sleeve 13 are socketed in the surface of kelly 103 by connecting hole 14, and such as Fig. 3 passes through setting reinforcing sleeve 13 and connecting hole
14, kelly 103 can be limited, avoid the phenomenon that junction of kelly 103 and connector sleeve 101 is easy to appear damage,
The service life of kelly 103 is improved, the bottom of 1 two sides of electric energy meter ontology is provided with drier 15, and drier 15 wraps
Sealing drum 151, dry screen drum 152 and T-bar 153, sealing drum 151 is included to be connected in the bottom of 1 two sides of electric energy meter ontology, T-bar
153 are threaded in the inside of sealing drum 151, and dry screen drum 152 is fixedly connected on T-bar 153 close to the one of electric energy meter ontology 1
Side, such as Fig. 4 can replace dry screen drum 152 convenient for user, together by setting T-bar 153 and sealing drum 151
When do not have compared with certain anti-moisture mechanism for electric with existing electric energy meter, the drier 15 can be to electric energy meter ontology 1 inside
Air is dried, and avoids humid air and is easy to show to what the element inside electric energy meter ontology 1 impacted for a long time
As T-bar 153 is fixedly connected with fanning strip 16 far from the side of electric energy meter ontology 1, and the surface of T-bar 153 is socketed with positioned at close
The elastic seal ring 17 in 151 outside of sealed tube, as Fig. 4 can be by own resilient to T-bar by the way that elastic seal ring 17 is arranged
153 are pushed, and the phenomenon that T-bar 153 is easy to appear revolution is avoided, and improve the stability of T-bar 153, electric energy meter sheet
The two sides of 1 bottom of body are fixedly connected to backing plate 18, and the surface of backing plate 18 is fixedly connected with rubber pad 19, such as Fig. 1, pass through setting
Backing plate 18 and rubber pad 19 can carry out a degree of protection to the bottom of electric energy meter ontology 1, avoid electric energy meter ontology 1
Bottom and object the phenomenon that directly colliding, the top of electric energy meter ontology 1 is hinged with protective jacket 5, protective jacket 5 by pin shaft
Bottom be fixedly connected with rubber sleeve 6, the front of protective jacket 5 is fixedly connected with square set 7, and the positive top of electric energy meter ontology 1 is solid
Surely it is connected with positioning sleeve 8, positioning sleeve 8 is internally provided with fixed mechanism 9, and fixed mechanism 9 includes pull ring 91, pull rod 92, baffle
93 and spring 1, baffle 93 is slidably connected at the inside of positioning sleeve 8, and the front side of positioning sleeve 8 is arranged in pull ring 91, and pull rod 92 is solid
Surely it is connected to the back side of pull ring 91, the rear end of pull rod 92 is through to the inside of positioning sleeve 8 and is fixedly connected on the front of baffle 93,
Spring 1 is set in the surface of pull rod 92, and the rear end of spring 1 is fixedly connected on the surface of baffle 93, before spring 1
End is fixedly connected on the inside of positioning sleeve 8, and such as Fig. 5 can limit pull rod 92 by setting baffle 93 and spring 1
Position, avoids the phenomenon that pull rod 92 shakes when not in use, improves the stability of pull rod 92, the bottom of square set 7 passes through
Positioning sleeve 8 and the bottom for extending to positioning sleeve 8.
When in use, user is pulled along pull ring 91 first and rotates protective jacket 5, makes protective jacket 5 that square set 7 be driven to be caught in
The inside of positioning sleeve 8, while protective jacket 5 will drive the top that rubber sleeve 6 is pressed on electric energy meter ontology 1, then unclamp pull ring 91,
One 94, spring can push baffle 93 by elastic force, and the inside for making baffle 93 be caught in square set 7 carries out position to protective jacket 5
It is fixed, to achieve the effect that protect at the operation panel to electric energy meter ontology 1, when needing the angle to handle 4
When being adjusted, connector sleeve 101 being held first and is pulled, connector sleeve 101 drives kelly 103 to be detached from through-hole 104, at this moment can turn
Dynamic handle 4, unclamps connector sleeve 101 after handle 4 reaches proper angle, 2 12, spring can by elastic force to connector sleeve 101 into
Row pushes, and makes connector sleeve 101 that kelly 103 be driven to pass through through-hole 104 and be caught in the inside of connecting hole 14 to position handle 4,
Use can be completed.
In conclusion the portable electric energy meter, the table of electric energy meter ontology 1 is pressed on by the drive rubber sleeve 6 of protective jacket 5
Face is protected, then is carried out position to protective jacket 5 by positioning sleeve 8 and square set 7 by fixed mechanism 9 and fixed, to have energy
It is enough to being protected at the operation panel of electric energy meter the advantages of, do not have at the operation panel that solves existing portable electric meter
Certain protection mechanism, so that when not in use, dust and water droplet are easy to drop down onto the inside of cabinet to member by the gap of key
Part impacts, a degree of the problem of reducing electric energy meter service life, uses convenient for people.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of portable electric energy meter, including electric energy meter ontology (1), it is characterised in that: the two of the electric energy meter ontology (1)
Side is fixedly connected to fixed cylinder (2), and the surface of the fixed cylinder (2) is socketed with support sleeve (3), the electric energy meter ontology (1)
Top be provided with handle (4), the both ends of handle (4) bottom are fixedly connected in the surface of support sleeve (3), the electric energy
The top of table ontology (1) is hinged with protective jacket (5) by pin shaft, and the bottom of the protective jacket (5) is fixedly connected with rubber sleeve
(6), the front of the protective jacket (5) is fixedly connected with square set (7), and the positive top of the electric energy meter ontology (1) is fixedly connected
Have positioning sleeve (8), the bottom of the square set (7) passes through positioning sleeve (8) and extends to the bottom of positioning sleeve (8).
2. a kind of portable electric energy meter according to claim 1, it is characterised in that: the inside of the positioning sleeve (8)
It being provided with fixed mechanism (9), the fixed mechanism (9) includes pull ring (91), pull rod (92), baffle (93) and spring one (94),
The baffle (93) is slidably connected at the inside of positioning sleeve (8), and pull ring (91) setting is described in the front side of positioning sleeve (8)
Pull rod (92) is fixedly connected on the back side of pull ring (91), and the rear end of the pull rod (92) is through to the inside of positioning sleeve (8) and consolidates
Surely it is connected to the front of baffle (93), the spring one (94) is set in the surface of pull rod (92), after the spring one (94)
End is fixedly connected on the surface of baffle (93), and the front end of the spring one (94) is fixedly connected on the inside of positioning sleeve (8).
3. a kind of portable electric energy meter according to claim 1, it is characterised in that: the surface of the fixed cylinder (2)
It is arranged limited position mechanism (10), the position-limit mechanism (10) includes connector sleeve (101), square plate (102), kelly (103) and through-hole
(104), the connector sleeve (101) is set in side of fixed cylinder (2) surface far from electric energy meter ontology (1), the square plate (102)
It is fixedly connected on the inside of connector sleeve (101), the square plate (102) is through to fixed cylinder close to the one end of electric energy meter ontology (1)
(2) inside, the kelly (103) are fixedly connected on the side of connector sleeve (101) close to electric energy meter ontology (1), the through-hole
(104) surface of support sleeve (3) is opened up, the kelly (103) passes through through-hole (104) simultaneously close to the one end of electric energy meter ontology (1)
Extend to the outside of support sleeve (3).
4. a kind of portable electric energy meter according to claim 3, it is characterised in that: the square plate (102) is close to electricity
One end of energy table ontology (1) is fixedly connected with limit plate (11), and the limit plate (11) is slidably connected at the interior of fixed cylinder (2)
Portion, the limit plate (11) are fixedly connected with spring two (12) far from the side of electric energy meter ontology (1), the spring two (12)
Right end is fixedly connected on the inside of fixed cylinder (2), and the shape on limit plate (11) surface and the shape of fixed cylinder (2) inner wall are equal
It is rectangular.
5. a kind of portable electric energy meter according to claim 3, it is characterised in that: the surface of the fixed cylinder (2)
It is fixedly connected with the reinforcing sleeve (13) being located on the inside of support sleeve (3), offers connecting hole (14) on the left of the reinforcing sleeve (13),
The reinforcing sleeve (13) is socketed in the surface of kelly (103) by connecting hole (14).
6. a kind of portable electric energy meter according to claim 1, it is characterised in that: the electric energy meter ontology (1) two
The bottom of side is provided with drier (15), and the drier (15) includes sealing drum (151), dry screen drum (152) and T
Shape bar (153), in the bottom of electric energy meter ontology (1) two sides, the T-bar (153) is threadedly coupled for sealing drum (151) connection
In the inside of sealing drum (151), the dry screen drum (152) is fixedly connected on T-bar (153) close to electric energy meter ontology (1)
Side.
7. a kind of portable electric energy meter according to claim 6, it is characterised in that: the T-bar (153) is far from electricity
The side of energy table ontology (1) is fixedly connected with fanning strip (16), and the surface of the T-bar (153) is socketed with positioned at sealing drum
(151) elastic seal ring (17) on the outside of.
8. a kind of portable electric energy meter according to claim 1, it is characterised in that: electric energy meter ontology (1) bottom
The two sides in portion are fixedly connected to backing plate (18), and the surface of the backing plate (18) is fixedly connected with rubber pad (19).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201910544701.4A CN110244089A (en) | 2019-06-21 | 2019-06-21 | A kind of portable electric energy meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201910544701.4A CN110244089A (en) | 2019-06-21 | 2019-06-21 | A kind of portable electric energy meter |
Publications (1)
Publication Number | Publication Date |
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CN110244089A true CN110244089A (en) | 2019-09-17 |
Family
ID=67888889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201910544701.4A Withdrawn CN110244089A (en) | 2019-06-21 | 2019-06-21 | A kind of portable electric energy meter |
Country Status (1)
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CN (1) | CN110244089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113156179A (en) * | 2021-05-29 | 2021-07-23 | 赵玉梅 | Portable combined electric energy meter and use method thereof |
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CN207354155U (en) * | 2017-06-19 | 2018-05-11 | 德州科辉太阳能有限公司 | A kind of adjustable fixing for solar panel |
CN207924124U (en) * | 2018-01-02 | 2018-09-28 | 保定科远电力设备有限公司 | A kind of electric energy meter on-site calibrator |
CN208705377U (en) * | 2018-07-27 | 2019-04-05 | 国网安徽省电力有限公司检修分公司 | A kind of ammeter of the electric power inspection with protective action |
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JP2005082733A (en) * | 2003-09-10 | 2005-03-31 | Sanyo Chem Ind Ltd | Resin composition |
CN201387583Y (en) * | 2009-04-07 | 2010-01-20 | 陆芸 | Keyboard with dust cover |
CN206223838U (en) * | 2016-12-07 | 2017-06-06 | 齐迪 | A kind of high school physicses oscillograph protection device |
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Publication number | Priority date | Publication date | Assignee | Title |
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