单项选择题
A.管道壁厚大于4mm B.管道壁厚大于6mm C.管道壁厚大于10mm D.管道壁厚大于12mm
A.0.5°～0.8° B.1°～2° C.2°～3° D.3°～4°
A.500-6000C B.700-7500C C.900-9500C D.1100-12000C
A.浮桶式疏水阀 B.公称压力为1Mpa的热动力式疏水阀 C.公称压力为1.6Mpa的热动力式疏水阀 D.公称压力为2.5Mpa的热动力式疏水阀
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