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hard ground
archit.
construct. 硬基
handb. 坚硬场地; 坚硬的场地
ocean. 硬底质; 粗糙不平底质
space 硬接地
tech. 坚固地基; 硬地 (基); 硬防蚀剂; 硬底; 岩底; 坚实地基; 不整合面
hard ground: 11 phrases in 4 subjects
Ecology1
Explosives and Explosive Ordnance Disposal3
Oil / petroleum1
Technology6