简要介绍了国外最新应用的清蜡、防蜡方法，诸如油井油管注入阀清蜡、负压冲击清蜡、井下就地产热清蜡、油井直接电加热清蜡和使杆管表面亲水防蜡等。
The latest technologies in paraffin removal and control in foreign countries are briefly introduced, such as paraffin removal by oil well tubing fillup valve, negative pres…
巴扎尔吉特当初设计了一个安全阀，当管网中的污水太多时，不经处理的污水便直接注入泰晤士河。
Bazalgette's design included a safety valve: when too much waste enters the system, raw sewage runs into the River Thames.
这种调节阀设置用于将水以15磅的压力注入锅炉中。
The regulator is set to deliver water to the boiler at approximately 15 lbs. pressure.
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