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掌子面
gen.	breast
el.	coal face
eng.geol.	drift face; pilot drift
hydroel.st.	heading
tech.	active face; face of work area; heading face; tunnel face; tunnel heading; working face; working place
隧洞掘进掌子面
el.	heading face
岩层掌子面
eng.geol.	rock face
掌子面地下工程或采矿工程中的开挖工作面。又称隧道掘进工作面、隧道开挖的岩石表面、隧道工作面、隧道端掘进的工作面
expl.	tunnel face
掌子面工作面
hydroel.st.	heading face

掌子面: 10 phrases in 2 subjects

Engineering geology	1
Technology	9