rock head meaning in English
表土下硬岩层的顶部
岩层顶
Examples
- I know your big ol ' rock head has something smart to say
我就知道你的石头脑袋有什么话要说 - Abstract : applying the rule and methods of value engineering ( ve ) in the research on rock heading machine assembly has made good benefit
文摘:应用价值工程( ve )原理和方法，对岩巷掘进机械化作业线配套进行研究，使其取得良好的经济效益。