Shell has one central pump liquid inhalationinhalationtube 4 and 5 connected.
泵壳中央有一液体吸入4与吸入管5连接。
2
Inhalationtube not filled with liquid, the pump through the role of automatic exhaust fluid, adapted to extract from the ground container liquid.
吸入管内未充满液体时，泵通过自动抽气作用排液，适应于从地下容器中抽提液体。
3
Pump bearings have sufficient stiffness to ensure a balanced operation of pump, if running in the deep well, we can get more of a Inhalationtube (indicated in the contract).