问题
单项选择题
管子经锯床切割后，须检查管件切割端面的垂直度，不垂直度应小于（）。
A.0.2度
B.0.4度
C.0.5度
D.0.8度
答案
参考答案：C
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管子经锯床切割后，须检查管件切割端面的垂直度，不垂直度应小于（）。
A.0.2度
B.0.4度
C.0.5度
D.0.8度
参考答案：C
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