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earth core
expl. 接地芯线
hydroel.st. 地心; 土质心墙
oil 地核
tech. 电缆的接地心线; 接地软线
earth core: 27 phrases in 10 subjects
Agriculture1
Aviation1
Communications1
Ecology1
Electronics2
Engineering geology3
Hydroelectric power stations7
Space2
Technology8
Water resources1