题目内容
(请给出正确答案)
[单选题]
碗扣式模板支架的下碗扣采用钢板热冲压成型时,其板材厚度不得小于()。
A.4mm
B.5mm
C.6mm
D.7mm
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A.4mm
B.5mm
C.6mm
D.7mm
A.500mm
B.550mm
C.600mm
D.650mm
A.1.2m
B.1.5m
C.1.8m
D.2m
A.55mm
B.65mm
C.75mm
D.85mm
A.6m
B.7m
C.8m
D.9m