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wall rock
eng.geol. 洞室围岩
hydroel.st. 围岩
tech. 孔壁岩石; 井壁岩石
wall rock
: 32 phrases in 13 subjects
Biology1
Bridge construction1
Desert science1
Drilling1
Earth sciences1
Explosives and Explosive Ordnance Disposal1
Management2
Mountaineering1
Nautical1
Oil / petroleum2
Rail transport1
Solar power1
Technology18

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