考试
2020-03-16 05:33:16

3926 Sealing in pump shaft is

题目描述

Sealing in pump shaft is achieved by means of the ().A.gasketB.packingC.o-ring



Sealing in pump shaft is achieved by means of the ().

A.gasket

B.packing

C.o-ring

请帮忙给出正确答案和分析,谢谢!

答案解析

B

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