... spherical permeability 球形流动渗透率 spherical pig 清管球 spherical polar coordinates 球极坐标 ...
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Some principles about operation of spherical pig stipulated during the initial period of terminal production bring about a plenty of not only gas emission but also energy waste.
投产之初制订的清管球作业规定造成了大量的天然气排放,极大地浪费了能源。
参考来源 - 崖城气田南山终端油气混输管线工艺技术改造·2,447,543篇论文数据，部分数据来源于NoteExpress
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