尤其适用于对径向尺寸有限制要求的油田井下作业。
Especially it is the same with borehole operation which is limited in radial dimension.
超压保护装置主要是为油田井下压裂施工仪表车而设计的。
The overpressure protection equipment is mainly designed for hydraulic fracturing in oil field.
提出油田井下岩芯表面瑞利波的激光全息测试方法，给出了测量结果并进行了分析和讨论。
A laser holographic method of measuring the surface Rayleigh-wave rate of the core taken from the oil-drill of Daqing is given. The measured results were analyzed and discussed.
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