biased,highlyangledtwill,steeptwill ,twill,uprighttwill是什么意思

用法例句

The horizontal section top coal caving in steep seam is different from the gently inclined seam.

急斜煤层水平分段放顶煤开采与缓斜煤层不同,工作面沿煤层厚度的水平线布置,长度短。

It mostly study on the content of the relationship between support and surrounding rock in longwall top-coal caving mining of steep seam by using field observation, theory calculation, similar and numerical simulation.

本文结合新疆乌鲁木齐矿区的实践,利用现场实测、理论计算、相似模拟和数值模拟等手段,以急斜煤层综放开采“支架-围岩”相互作用关系为核心研究内容,对急斜煤层综放开采的工作面矿压显现规律、开采引起的上覆层结构形式、顶煤冒落特点和支架合理结构的分析等相关内容全面地进行了研究,取得了一些有创建性的研究成果。