单项选择题
A.不大于16m B.不小于1m C.不大于25m D.不大于20m
A.1.5 B.10 C.15 D.20
A.0.1MPa B.0.2MPa C.0.14MPa D.0.16MPa
A.10mm B.15mm C.8mm D.20mm
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