✦ LIBER ✦

Practice and Drilling Technology of Gas Extraction Borehole in Soft Coal Seam

✍ Scribed by Ningping Yao; Xinsheng Yin; Yi Wang; Li Wang; Qianhui Ji

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

A hydraulic model of gas filtration in b

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✍ Dongji LEI; Chengwu LI; Zimin ZHANG; Yugui ZHANG 📂 Article 📅 2010 🏛 Elsevier 🌐 English ⚖ 555 KB

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✍ Jiangwei Fu; Xuehai Fu; Xiao Hu; Li Chen; Jianchun Ou 📂 Article 📅 2011 🏛 Elsevier 🌐 English ⚖ 805 KB

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✍ Liang Yuan 📂 Article 📅 2009 🏛 China Coal Society 🌐 English ⚖ 790 KB

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✍ Li Hui; Jing Guo-xun; Xu Lu 📂 Article 📅 2011 🏛 Elsevier 🌐 English ⚖ 869 KB

Gas control technology of working face i

✍ Wang Zhao-feng; Chen Xiang-jun; Yang Hong-min 📂 Article 📅 2009 🏛 Elsevier ⚖ 376 KB