reverse tachometer reading 反向转速表读数

distant reading tachometer 遥读转速计 ; [自] 远程读数转速计 ; 远距离读数转速计

remote reading tachometer 遥读转速计

distance reading tachometer [自] 遥测转速计

direct-reading tachometer 直读式转速表

direct reading tachometer 直读式转速表

remote-reading tachometer 远程读数转数计