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cutting coal

cutting coal

cutting coal

cutting coal

2

Robert and Slogger were still cutting coal when David reached them .

当大卫到达罗伯特和斯洛格跟前时，他们还在采煤。

3

Controlling Roof Technique of Two-way Narrow Web Cutting Coal in Fully Mechanized Coal Mining Face

综采工作面双向浅截深割煤控制顶板工艺

4

Reinforced support technology of gateway for hydraulic powered supports removed from high cutting coal mining face

大采高工作面撤架通道加固支护技术

5

Strata pressure behavior and control for fully mechanized high cutting coal mining face

大采高综采工作面矿压显现及其控制

6

Rapid excavation of conveyor gateway for fully mechanized high cutting coal mining face

大采高综采工作面运输顺槽的快速掘进

7

The Experiment Study of Flat Pick Cutting Coal and Rock

刀型截齿截割煤岩的实验研究

8

The Handling Way of the Breaking Roof at Cutting Coal Face

回采工作面破碎顶板的处理方法

9

Drilling Hole Design Improvement of Gas Suction of Cross-measure Cutting Coal

石门揭煤瓦斯抽放钻孔设计方法的改进

10

The Research and Design of Hydraulic Chain -saw Cutting Coal Machine

全液压链锯式割煤机的研究与设计

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