rock drill steel

常见例句

In this article, Rock Drill, Drill Steel, Bit and Rock have been carefully studied as a whole system.
以鑿巖機、釺杆、釺頭及巖石作爲一個整躰系統進行了細致的研究。
In order to enhance the service hfe of hollow steel for rock drill stem, the odd number side section shape hollow steel has been designed.
爲了提高鑿巖釺杆用中空鋼的使用壽命，設計了奇數邊截麪形狀的中空鋼。
Through the shallow hardening treatment, the steel T8A can have better contact-fatigue resistance to the repeatedimpactload-test and can be used for making the piston of rock drill.
經薄層硬化的T8A鋼，可以獲得較好的多沖接觸疲勞抗力，故有可能作爲鑿巖機活塞用材。