单选题The locking pin that joins the parts of a detachable link is held in position by（）.Aa tack weldBthe self-locking characteristics of its taperCa cotter pinDa lead plug
单选题
The locking pin that joins the parts of a detachable link is held in position by（）.
A
a tack weld
B
the self-locking characteristics of its taper
C
a cotter pin
D
a lead plug
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