negative suction head 真空吸入压头
negative suction system 负压抽吸装置
negative-pressure suction 负压抽吸
negative pressure suction 负压吸疱
Negative pressure suction system 负压吸附系统
Negative suction is the commonly used technique for fracturing fluid preparation.
抽 汲是压裂液普遍采用的配制工艺技术。
The key to produce this shallow gas is to use a set of negative suction technique besides that a series of measures for protecting the shallow gas-bearing formation must be adapted while drilling.
要把这类浅层气开采出来，除必须实施保护浅气层的钻井措施外，关键在于采用一套负压抽汲采气技术。
How it works: the piston moves from left to right, form a negative pressure pump cylinder, then the suction tank fluid through the valve into the pump cylinder.
工作原理：活塞自左向右移动时，泵缸内形成负压，则贮槽内液体经吸入阀进入泵缸内。
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