A.泵房集水井進口處 B.沉砂池出口處 C.曝氣池進口處 D.泵房出口處
A.75% B.80%左右 C.85% D.90%左右
A.節(jié)流流量計 B.轉(zhuǎn)子流量計 C.葉輪流量計 D.層流流量計