问题
单项选择题
A single heavy wire made up for the topping lift is called a（）.
A.Bale
B.Spanner wire
C.Bull line
D.Working guy
答案
参考答案：A
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A single heavy wire made up for the topping lift is called a（）.
A.Bale
B.Spanner wire
C.Bull line
D.Working guy
参考答案：A