long distance water level recorder

... air-distance recorder 飞机航程记录器 long distance water level recorder 遥测水位计 long distance water-stage recorder 远距离水位计 ; 远间隔水位计 ...

 telemetering stage recorder

... 超声波水位计 ultrasonic stage recorder 遥测水位计 telemetering stage recorder 接触试水位计 contact-type stage recorder ...