问题
单项选择题
水泵填料箱加盘根时,每根盘根的接口必须错开()。
A.90°
B.180°
C.120°
答案
参考答案:C
水泵填料箱加盘根时,每根盘根的接口必须错开()。
A.90°
B.180°
C.120°
参考答案:C
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