摆动式转向架
Swing Motion bogie
swing type bogie
Bogie with swing bolsters
差动传动式转速表
differential drive tachometer
电动气动式转辙机
electropneumatic switch machine
电动式转换器
electrodynamic transducer
电动式转速表
electrodynamometer type tachometer
刚性腿移动式转臂起重机
stiffleg derrick traveler
回转式柱塞真空泵
rotary piston vacuum pump