无遮挡十八禁高潮网站女人喷水_三级片在线播放网址_色噜噜狠狠狠天天懆_悠悠资源AV先锋影音免费_老子影院午夜久久亚洲_老熟女hdxx中国老熟女_午夜激情电影国产欧美_中文字幕在线精品亚洲区一区_亚洲国产乱码99_大片免费播放网站片

Double size: length 1600mm*width 600mm*height 750mm (screen height 900mm+300mm)

1. The lifting screen is equipped with lifting baffles on the left, right and front three sides, and the edge of the lifting board is 300mm higher than the side board, which is used to block the sight of adjacent candidates. It can be used as an ordinary computer classroom when it is lowered.
2. Table board requirements: The board is made of 16mm environmentally friendly solid wood particle board with a melamine board. The board meets the E1 environmental protection standard, the board surface is flat, the color is uniform, strong, no irritating odor, and the formaldehyde emission is less than 1.5mg/L .
3. Lifting screen board: The board is made of 15mm thick environmentally friendly solid wood particle board with melamine board. The board meets the E1 environmental protection standard, the board surface is flat, the color is uniform, strong, no irritating odor, and the formaldehyde emission is less than 1.5mg/L.
4. The cutting surface of the table body plate adopts aluminum alloy edging, and the aluminum material adopts the plug-in method. The outer surface of all aluminum materials must not expose screws and sharp hardware. The sharp edge of the aluminum profile cutting surface must not be higher than or exposed on the outer surface of the table. Ensure that the body is not scratched during use.
5. In order to ensure the overall stability and beauty of the lifting card seat, the overall fixing screw adopts a hidden design.
6. The desktop of the lifting deck adopts E1 grade 25mm thick particle board, the desktop is decorated with fireproof board, and the edge is made of duckbill shape, and the formaldehyde emission is less than 1.5mg/L.
7. The leg space occupied by the deck lifting power device is as small as possible. In order not to affect the movement space of the students' legs after sitting down, the depth of the side board of the table should not be less than 540mm.
8. The motor power of the built-in power unit of the deck is less than or equal to 100 watts, and the noise of the motor is less than or equal to 48 decibels.
9. Two kinds of working modes: paper and computer test mode (the screen is raised to prevent cheating), and the normal teaching mode (the screen is lowered)
10. The back of each classroom desk is made of acrylic with numbers 1 to N, which is convenient for examination records