新型橡塑助剂NRF901补强性能的研究--中国橡胶助剂网 关键词:补强助剂;炭黑;烟煤;煤矸石 [gap=608]Keywords:strengthening helping agent;carbon black;soft coal;gangue
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soft coal seam 松软煤层
soft coal level 松散煤层
soft coal layer 无冲击倾向
soft coal entry 软岩煤巷
sulphur soft coal 高硫烟煤
soft coal roadway 软岩煤巷
soft coal boilers 烟煤锅炉
blowing soft coal 喷吹烟煤
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同义词： bituminous coal
以上来源于: WordNet
N → another name for bituminous coal
The combustion characters of petroleum coke were between those of soft coal and anthracite .
石油焦的燃烧特性处于烟煤和无烟煤之间。
However, with the extension of mining depth, the distribution of soft coal seam has been expanding.
然而，随着矿井开采范围的延深，松软煤层的分布范围呈不断扩展趋势。
The II3123 face is a light type caving face of three-soft coal seam. the roof is cracked, sloughing and roof fall often occur.
前言： 石台煤矿II3123工作面为“三软”煤层轻放工作面，顶板破碎易掉，片帮、冒顶时常发生。
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