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最近,四川石油管理局在都江堪市组织召开的钻头鉴定会,对成都总机械厂研制的折产品—川石024刁.sm翻渭川田25和D31 1.lmml,2型三牙轮钻
Recently, the Sichuan Petroleum Administration held a drill identification meeting held in Dujiangyan City, aiming at the folding products developed by Chengdu General Machinery Plant - Chuan Shi 024 Diao. Sm over Wei Chuan Tian 25 and D31 1.lmml, 2 type three roller cone