问题
单项选择题
当安全卡瓦的丝杠销损坏时,()用其它材料代替。
A.可以
B.不能
C.可以暂时
D.一般不能
答案
参考答案:B
当安全卡瓦的丝杠销损坏时,()用其它材料代替。
A.可以
B.不能
C.可以暂时
D.一般不能
参考答案:B
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