單項(xiàng)選擇題一般圓鋼定尺的長度允許偏差為()

A.0~40mm
B.0~50mm
C.0~60mm
D.0~70mm


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1.單項(xiàng)選擇題非管坯鋼60圓鋼的不圓度≤()

A.0.5mm
B.0.9mm
C.1.2mm
D.1.4mm

2.單項(xiàng)選擇題非管坯60圓鋼的允許偏差為()

A.±0.5mm
B.±0.7mm
C.±0.8mm
D.±1.0mm

3.單項(xiàng)選擇題管坯鋼60圓鋼的不圓度≤()

A.0.5mm
B.0.9mm
C.1.2mm
D.1.4mm

4.單項(xiàng)選擇題管坯60圓鋼的允許偏差為()

A.±0.5mm
B.±0.7mm
C.±0.8mm
D.±1.0mm

5.單項(xiàng)選擇題剪切110圓鋼的上剪刃的開口度為()

A.125mm
B.126mm
C.127mm
D.128mm