单项选择题
支座螺栓(锚栓)露出长度的允许偏差为()。
A.-15mm和+15mm
B.-15mm和+30mm
C.0mm和+15mm
D.0mm和+30mm
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单项选择题
A.-15mm和+15mm
B.-15mm和+30mm
C.0mm和+15mm
D.0mm和+30mm
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