从理论上分析了被动调Q 激光器的运转及其优化。
Then the theory and optimization of passively Q-switched laser were researched.
齿轮油泵在运转时主动齿轮带动被动齿轮旋转，当齿轮从啮合到脱开时在吸入侧(A)就形成局部真空，液体被吸入。
Gear pumps in operation when the passive gear driven rotary gear, when the gear was torn off from the mesh to the side when inhaled (a) on the formation of partial vacuum, the liquid to be inhaled.
制浆造纸厂使用的造纸过程泵发生故障的现象几乎很普遍，人们通常采用被动检修的方法来维持其低效的运转，这是以很高的维修费用和停机损失做为代价的。
The process pumps in pulp and paper mill are often out of order, their inefficient operation is at the expense of a great deal of maintenance cost and production.
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