common supply and exhaust duct 共用给排气烟道 ; 公用给排气烟道
common supply and control line 供能控制共用管路
common supply pressure 共用气源压力
a common power supply cable 一个共同的电源线
common water supply pipe 常用给水管材
common carrier current supply 载频电流供给装置
collective supply of common resource 共享资源集体供给
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