单选题The shells are secured by means of bearing caps and studs, the necessary clearance being provided by means of （） of different thickness.AshimsBpackingCglandsDwashers
单选题
The shells are secured by means of bearing caps and studs, the necessary clearance being provided by means of （） of different thickness.
A
shims
B
packing
C
glands
D
washers
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