1)caved hole,有洞穴的井眼2)bare hole cave completion,裸眼洞穴完井3)openhole cavity completion,裸眼洞穴法完井4)cavity completion,洞穴完井5)borehole cavity,井眼空穴6)A hole formed by excavating.,洞，穴挖掘的洞穴
用法例句
Analysis on the mechanisms of bare hole cave completion technology in the development of coalbed methane,the stressing states of strata around the cave and some relative formulas are presented,and the valuable application suggestions are advanced.
