Glass steel coring tool is specifically developed for improving the core recovery of conglomeratic weakformation 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。
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The time factor problems of tunnel surrounding rock vs. supporting system in weakformation are analysed and the reasonable supporting time is broadly explored with rheological theory.
The initial stages of repair include the formation of functionally weak tissue that is not capable of supporting tensile forces that allow early active range of motion.