Results 101 to 102 of about 300 (102)

水平井智能分段开采工艺管柱的研制与应用

open access: yesShiyou jixie, 2013
王小勇   +5 more
doaj  

简易防砂坐封验封一趟管柱工艺研究及试验

open access: yesShiyou jixie, 2013
程心平   +4 more
doaj  

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