exch[经] 交易所
EXCn.开挖(激励器;排气关闭)
excavating wheel挖斗轮
Excision of nail甲切除术
excavating plant挖土机械设备
excitaton source激发源
excavator factor挖掘系数
excluding effect挤出效应
excurrent siphon出水管
excusive carrier唯一载体
excitatory state兴奋状态
exchanging slips兑换凭单