frozen-clay drill 冻土钻机
frozen-clay E drill 冻土钻机
clay drill
粘土钻
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The council said two companies were applying to Mendip district council for permission to test drill for the gas, which is found in shale formed from deposits of mud, silt, clay and organic matter.
FORBES: Not a Good Argument Against Fracking
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