老顶 meaning in Chinese
main roof
upper roof
Examples
- Probe into methane geological law in anlin coal mine
工作面老顶初次垮落机理的探讨 - Influence of roof bedding characteristic to first weighting interval
老顶分层厚度对工作面初次来压步距的影响 - Analysis of the way for the main roof caving relating to the staggered sublevel caving method
错层位放顶煤方法老顶垮落方式分析 - Note that there is a series of tops and bottoms on the daily high and low chart between 267 and 271 , but the old top at 264 , made on march 27 , is important for support
低点图上的267与271之间有底顶的串连一，但是3月27日形成的老顶部264是一个重点支撑位。 - Note that there is a series of tops and bottoms on the daily high and low chart between 267 and 271 , but the old top at 264 , made on march 27 , is important for support
注意在日高低点图上的267与271之间有一连串的顶底，但是3月27日形成的老顶部264是一个重点支撑位。