Single-acting pump单动泵;[机] 单作用泵
single-acting ram单作用锤头;单动式桩锤
single-acting atomizer单动式弥雾机
Single-acting compressor[机] 单作用压缩机;单作用压缩机;单向作用压缩机
single-acting cylinder单作用缸;单线制
single-acting solenoid单作用电磁铁
duplex single-acting双缸单作用
single-acting engine单动发动机;单动式引擎;单动策念头;单动引擎
single-acting relay单侧作用继动器
ADJ（形容词） (of a reciprocating engine or pump) having a piston or pistons that are pressurized on one side only (往复式发动机或泵)单动的; 即只有侧面活塞加压活动的 → compare double-acting