单选题With the shell and cap assembled as for running, a check must be made that the clearance between the cap and the housing ().Ahas a nipBis large enoughCis zeroDare suitable

单选题
With the shell and cap assembled as for running, a check must be made that the clearance between the cap and the housing ().
A

has a nip

B

is large enough

C

is zero

D

are suitable


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