直流转速计 DC tachometer

涡流转速计数器 eddy current revolution counter

转子流速计 spinner-type velocimeter

涡流转速计 [仪] eddy-current revolution counter ; eddy current tachometer

涡流式转速计 Eddy Current Tachometers

流体转速计 fluid displacement tachometer

转杯式流速计 cup-type current-meter

断续直流转速计 [仪] interrupted dc tachometer

回转式流速计 Meter rotary