1、
The poles of the Earth precess at a right angle to the force that is applied.
地球的两极按照施加的力的大小以正确的角度不断地步进.
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2、
As two clocks precess in phase, problems may occur at only one phase relationship.
两个时钟产生相位, 问题也许就出现在相位关系上.
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3、
4、
基于PLC的钻削加工装置钻头自动循环控制电路的设计
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