Because oil fields need the water injection well monitoring device, design a kind of flow rate automatic flow valve that is applied in the water injection well monitoring device.
结合油田注水井监控装置的需要，设计了一种流量自动调节阀，用来配合注水井监控装置的使用。
The swirl-flow injection washing water-saving device is formed from swirl-nozzle, swirler and multi-stage injector.
本发明涉及一种旋流引射式洗涤节水器，它是由旋流喷嘴、旋流器和多级引射枪组成。
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