The outer casing superior surface, forms the configuration of the suction inlet, are inclined to the downwards.
形成吸入口外形的外壳上表面为朝前向下倾斜的状态，上表面有反射部分。
2
B. water-filled pump start before the pump casing and suction pipe must be full of water that is because of the presence of air vacuum pumping the population can not be formed and maintained.
Sewage slurry pump is single stage single suction vertical centrifugal pump, the main components are volute, impeller, pump base, pump casing, support tube, motor base, motor and other components.