The significance of study on the subject is to develop a non-contact mode method of caliper logging.
课题研究的意义在于研制一种通过非接触方式测量井径的方法。
The new sealing device adopts non-contact labyrinth spiral sealing mode, prevents the wear caused by the solids.
这种密封装置采用非接触迷宫螺旋密封型式，克服了固体颗粒造成的磨损；
The new sealing device adopts non-contact labyrinth spiral sealing mode, prevents the wear caused by the solids.
这种密封装置采用非接触迷宫螺旋密封型式，克服了固体颗粒造成的磨损；
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