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扩孔钻头 kuòkǒng zuàntóu
bridg.constr.	counterbore cutter head
eng.geol.	enlarging bit; expanding bit; expansion bit
oil	reamer bit; reaming bit
tech.	broaching bit; gouge bit; hole dilating drill; hollow reamer; re-drill bit; under-reaming bit
扩孔钻头以硅酸盐和氧化钙为主要成分的混合物。利用水化反应产生的膨胀力传递到物体上，实现无声响、无振动地破碎混凝土和建筑物等 kuòkǒng zuàntóu
expl.	expanding reamer; hole reamer; expansion reamer; bit reamer

扩孔钻头 : 22 phrases in 4 subjects

General	1
Metallurgy	1
Oil / petroleum	1
Technology	19