... /T12722-1991 rubber and plastic hose assemblies music scratch hydraulic pulse test (half Ω test),The GB7939-92 hydraulic hose assemblies of ... -1.25 Hz,blunt speed can be arbitrarily set;3 pulse pressure pulse waveform: T shape, wave.4. Try check the oil ... fatigue test functions, but also for heat exchanger, air conditioner, filter pulse pressure test,2. The main components are imported components, safe ...