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上覆岩层 shàngfù yáncéng
dril. overlying rock
eng.geol. lap seam; overburden rock; superincumbent stratum
geol. overburden
上覆岩层
: 15 phrases in 6 subjects
Drilling4
Engineering geology3
Explosives and Explosive Ordnance Disposal1
Geology1
Oil / petroleum4
Technology2

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