A.30mm B.36mm C.42mm D.50mm
A.730±2 B.740±2 C.750±2 D.760±2
A.磨耗 B.腐蚀 C.变形裂纹 D.以上说法都对
A.30% B.40% C.50% D.60%
A.紧固 B.焊固 C.点焊
A.200～300mm B.300～350mm C.400～500mm D.450～550mm
A.2mm B.5mm C.8mm D.10mm
A.80kPa B.100kPa C.150kPa D.170kPa
A.50mm B.100mm C.150mm D.200mm
A.4mm B.5mm C.6mm D.7mm
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