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冲击回转钻进
eng.geol.
percussion rotation drilling
;
percussive-rotary drilling
tech.
combination drilling
;
percussion-rotation drilling
;
pounding-rotary drilling
冲击-回转钻进
el.
percussive-rotary drilling
冲击-回转钻进
钻头在孔底回转的同时,还通过一定的装置向其施加冲击力,以破碎岩石的钻进
expl.
percussion-rotary drilling
;
percussive-rotary drilling
;
combination drilling
;
combination-system of drilling
冲击回转钻进
:
8 phrases
in 2 subjects
Engineering geology
5
Technology
3
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