CBM exists freely in the coal cleat and other fracture pore.It can migrate freely powered by the pressure of formation water and the gas buoyancy.是什么意思_CBM exists freely in the coal cleat and other fracture pore.It can migrate freely powered by the pressure of formation water and the gas buoyancy.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句