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.
以凿岩机、钎杆、钎头及岩石作为一个整体系统进行了细致的研究。
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.
为了提高凿岩钎杆用中空钢的使用寿命，设计了奇数边截面形状的中空钢。
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.
经薄层硬化的T8A钢，可以获得较好的多冲接触疲劳抗力，故有可能作为凿岩机活塞用材。