This article narrated the application of the negative pressure wave method in the leak detecting system of transporting-oil pipe.
主要讲述了负压波理论在输油管道泄漏监测系统的具体应用情况。
This article narrated the meaning of carrying out cleaning engineering in trace analysis laboratories and described its characteristics and schemes through practical engineering examples.
阐述了痕量分析实验室实施净化工程的意义，并且通过工程实例重点说明其特点和具体做法。
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