特殊用法interlocked earthing1.联锁接地multipoint earthing1.多点接地neutral earthing1.中点接地neutral-point earthing1.中性点接地plate earthing1.板接地protective earthing1.保护接地surface earthing1.表面接地useful earthing1.有效接地earthing of casing1.外壳接地earthing of lightening arrester1.避雷器接地装置