主要指在煤在形成过程中形成的孔隙.主要包括胞腔孔和屑间孔，其中后者又可称作粒间孔或沉积结构孔。
水利工程专业词汇英语翻译O-1-SCIdict学术... ... 闸孔 Opening， gate 原生孔 Opening， primary 次生孔 Opening， secondary ...
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粒间原生孔和粒间溶蚀扩大孔是砂岩中极其重要的储集空间。
Primary inter-granular pores and the enhanced inter-granular dissolution pores are reorganised as the most important pore spaces.
研究区主要孔隙类型为粒间溶孔、剩余粒间孔和粒内溶孔，原生粒间孔、裂缝和铸模孔较少。
The main types of pore are corrosion pore between grains, residual pore between grains and corrosion pore in grains.
储集空间具有多成因性，以原生气孔和次生溶蚀孔为主。
The reservoir space has the multi - origins, by primary blowhole and secondary corrosion hole primarily.
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