A computer is a special kind of electrical appliance. It is different from TV and audio. It is always used when people use it. Therefore, there are specific requirements for the height of the computer and the position of the keyboard and mouse. Meet the criteria. Is it more interesting to have a bookcase and a computer-integrated desk? Today, Xiaobian wants to introduce you to the bookcase computer desk .
How to choose a bookcase computer desk?
When purchasing a computer desk, pay attention to the flatness of the board. The paint layer is free from blistering, falling off, uniform color, no burrs on the edge joints, no soft wraps on the plastic soft edges, smooth sliding on the drawers and keyboard trays, and a smooth computer table without shaking the table. . Incidentally, the computer desk should be placed in a well-ventilated place with direct sunlight.
High requirement
The desktop should not exceed 70 cm. Due to the unreasonable design of the computer desk, diseases such as low back pain, neck muscle fatigue or strain, tenosynovitis of the hand muscle and decreased vision are jeopardizing the work of computer-related workers.
Bed computer desk
According to a survey provided by the labor and health department, the Beijing Institute of Occupational Diseases Prevention and Control conducted a survey on the telecommunications industry, television stations, newspapers, laser photo-arrangement workshops and computer operators for three consecutive years from 1996 to 1998, 30%. The left and right respondents suffered from neck and wrist syndrome to varying degrees, and their visual acuity generally declined.
Computer Desk
According to experts, whether it is the height of the desk, the desk, or the height of the keyboard and mouse on the computer desk, should be the same or lower than the elbow when the person is sitting. The top of the display should not be higher than the horizontal line of sight of the sitting position, otherwise it will cause vision loss.
The design of the bookcase computer desk does not occupy space at all. It is not only a separate computer desk area, but also a book that you like. It is a very practical furniture. Today's Xiaobian introduction is here, I hope to help everyone buy.
Composite Geomembrane is a new type of anti-seepage material made by infrared ray heat with Geotextile(PET) and Geomembrane (PE .)
Including:
1) One layer geotextile and one layer membrane ; Weight of base geotextile : 100g/m2-1000gm2 ; Thickness of geomembrane :0.1mm-1.5mm .
2) Two layers geotextile and one layer membrane ; Weight of base geotextile : 80g/m2-600gm2 ; Thickness of geomembrane :0.2mm-1.5mm .
3) One layer geotextile and two layers membrane ; Weight of base geotextile : 100g/m2-1000gm2 ; Thickness of geomembrane :0.1mm-0.8mm .
4) Multi-layers : Weight of base geotextile : 100g/m2-1000gm2 ; Thickness of geomembrane :0.1mm-1.5mm .
Composite Geomembrane applied range
1,Landscape engineering: garage top greening, roof garden, football field, golf course, beach project.
2, Municipal engineering: road base, subway, tunnel, landfill.
3, Construction engineering : upper or bottom layer of building foundation, basement wall, bedding filtration and heat insulation.
4, Traffic engineering: highway, railway basement, dam and slope.
Composite Geomembrane technical index
(Confirming GB/T17642-1998 standard)
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Product weight (g/m2) |
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400 |
500 |
600 |
700 |
800 |
900 |
1000 |
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SPEC |
1 layer geotextile+1 layer geomembrane |
150/0.25 |
200/0.3 |
300/0.3 |
300/0.4 |
300/0.5 |
400/0.5 |
400/0.6 |
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2 layer geotextile+1 layer geomembrane |
100/0.2/100 |
100/0.3/100 |
150/0.3/150 |
200/0.3/200 |
200/0.4/200 |
200/0.5/200 |
200/0.5/250 |
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Breaking strength ,kN/m |
5.0 |
7.5 |
10.0 |
12.0 |
14.0 |
16.0 |
18.0 |
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Elongation at break |
30---100 |
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Tear strength , kN |
0.15 |
0.25 |
0.32 |
0.40 |
0.48 |
0.56 |
0.62 |
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CBR Mullen burst strength |
1.1 |
1.5 |
1.9 |
2.2 |
2.5 |
2.8 |
3.0 |
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Vertical permeability coefficient |
k *10-11~k*10-13 |
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Hydraulic pressure |
0.4~0.6 |
0.6~1.0 |
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Certificate
Composite Geomembrane
Composite Geomembrane,Composite Earthwork Film,Composite Geomembrane For Landfill,Pe Composite Geomembrane
Shandong Tianhai New Materials Engineering Co., Ltd , https://www.chinatinhy.com