... , stable performance, cost-effective, easy maintenance, with automatic test rig, automatic recording and impact times, temperature and frequency ... 20Hz,9:0 ~ flexible frequency curve 800r/min,10 and test line: 2 ~ 12 root,11 for pipe size: 6 ~ 70mm ... advanced control software, centralized control acquisition and processing print test pressure, temperature and frequency, pulse waveform is flexible. ...