探讨了煤体顶、底分层在距工作面不同距离上应力分布及位移变化特征的差异性；
The stress distribution and displacement variation of the coal top and bottom layer at different distances from the face are discussed;
博若夫曼整合了分层照明规划，那里面涵盖分阶段吊坠，深底的坛子，担任的工作方向，柜橱下的圆盘以及桌面儿和地板灯，全部这一切都是调光器。
Broffman integrated a layered lighting plan that includes period pendants, recessed cans, task directionals, under-cabinet pucks and tabletop and floor lamps, all of which are on dimmers.
分层注聚管柱主要由可洗井封隔器、配注器及底球组成。
The separated layer polymer injection pipe string consists of well-flushing packer, down-hole flow distributor and bottom ball.
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