3 7 inch color display mine ventilation detector

{"cid":"91180449","title":"Ventilation Multi-parameter Detector with 6 Parameters Measurement 3.7-inch Color Display and USB Interface for Coal Mine Ventilation Analysis","imgUrl":"https:\/\/img.chinax.com\/nimg\/a3\/3d\/96fa2e446878acc027cc1726313b-200x200-1.jpg","attrs":{"Brand Name":"topsky","Place of Origin":"china","Scanning Mode":"Phase scanning","Power Source":"Rechargeable batteries or external power supply","Wave Length":"447nm;415nm","Launcher":"49mm","Beacher Size":"73*16*50cm","Break Width":"60-140cm","Reel":"1set","Rotate":"0-120RPM","Bomb Diameter":"38mm","Mian Engine Size":"470* 357*176mm","Roll Stability Angle":"40 degrees","Frequency":"C band","Material":"High-strength steel, Kevlar, composite materials","Noise":"less than 30db","Oscillate Frequency":"460.18KHZ+\/\u20132KHZ"}}