| 1. | Soft coal burns with more flames than hard coal
烟煤燃烧时火焰较无烟煤多。
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| 2. | Supporting technology practice of soft coal and rock roadway
松软煤岩巷道支护技术实践
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| 3. | We also supply blind coal and soft coal from china and indonesia
煤炭产品主要是无烟煤与有烟煤等。
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| 4. | Study of computer identifying on tectonic soft coal with well log
地球物理测井技术在判识构造软煤中的应用
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| 5. | Research on optimization design of support mode in three - soft coal roadway
三软煤层巷道支护方式的优化设计研究
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| 6. | Applied study of secondary support technique for development roadway in soft coal seam
软煤层开拓巷道二次支护技术的研究
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| 7. | Stusy on the bolt - mesh - anchor supporting technique in the high - stress soft coal roadway
高应力软岩煤巷锚网索支护技术研究
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| 8. | 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
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| 9. | Analysis of support ways of roadway and its surrounding ' s control effect in three - soft coal seam
三软煤层巷道支护方式及围岩控制效果分析
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| 10. | 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
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