单选题The main function of the core of a wire rope is to（）.Agive flexibilityBsupport the strands laid around itCallow some circulation around the strandsDallow lubrication inside the rope
单选题
The main function of the core of a wire rope is to（）.
A
give flexibility
B
support the strands laid around it
C
allow some circulation around the strands
D
allow lubrication inside the rope
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