超声波测厚仪LA-AR850 测量范围 1.2-225.0mm(钢)  Accuracy ±(1%±0.1)mm  测量误差  Pipe Measuring Lower Limit φ20*3mm(Steel)  管材测量下限 φ20*3mm(钢)  Sound Velocity Range  1000-9999m/s  声速调节范围  Working Frequency 5MHz  (255,255,255);mso-shading:rgb(255,255,255);" > 湿度测量误差   ±5%