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单项选择题
A.400mm,20mm
B.300mm,30mm
C.300mm,20mm
D.350mm,25mm
单项选择题
A.25mm,50mm
B.25mm,40mm
C.20mm,50mm
D.30mm,45mm
单项选择题
A.9mm,7mm
B.10mm,6mm
C.10mm,5mm
D.9.5mm,6mm
单项选择题
A.10mm,0.2MPa
B.10mm,0.3MPa
C.12mm,0.3MPa
D.15mm,0.2MPa