Glass steel coring tool is specifically developed for improving the core recovery of conglomeratic weak formation and the core integrality in Liaohe Oilfield.
玻璃钢取心工具是专为提高辽河油田含砾石松散地层取心收获率和岩心完整性而研制的。
The time factor problems of tunnel surrounding rock vs. supporting system in weak formation are analysed and the reasonable supporting time is broadly explored with rheological theory.
本文以流变学理论为基础，对软弱地层内隧道围岩—支护系统的时间因素问题进行了分析，对合理的支护时间作了较为全面的探讨。
The time factor problems of tunnel surrounding rock vs. supporting system in weak formation are analysed and the reasonable supporting time is broadly explored with rheological theory.
本文以流变学理论为基础，对软弱地层内隧道围岩—支护系统的时间因素问题进行了分析，对合理的支护时间作了较为全面的探讨。
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