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1·LS series wet roots vacuum pump is a rough vacuum pumping equipment.

LS型直排大气湿式罗茨真空泵属粗真空获得设备。

2·In the thesis, I use the method of the rough and fine adjustment to achieve the switch control of the pump.

本文采用粗调节和细调节相结合的方式实现水泵的切换控制。

3·Brushing: Small areas on very rough material may be treated using a flat brush or a roller (which may be fed continuously with an airless pump).

刷涂：小面积粗略的材料可使用毛刷或辊。

4·There exists a rough linear rise for the output power with the pump power.

激光输出功率随抽运功率基本呈线性增长。