soft floor meaning in Chinese

软底板

Practices on fully mechanized coal mining in deep inclined seam with hard roof , soft coal and soft floor
软底大倾角煤层综采开采实践
Analysis on strata pressure of fully mechanized longwall coal mining face in soft roof , soft coal and soft floor seam
三软煤层综采长壁工作面采场矿压分析
Code of practice for use of spray extraction machines on carpets and soft floor coverings in hospitals
医院用地毯和软地板覆层的喷射物吸除器使用的实用规程
Fully mechanized top coal caving mining technology under unstable thick seam with soft roof , soft coal and soft floor
三软不稳定厚煤层条件下综采放顶煤技术
Experiment of supporting with meshing and bolting for entry driving along gob side within soft roof , soft floor and soft coal seam
煤层沿空掘巷锚带网支护的应用研究

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