... technology together ,is one kind of late-model NDT instrument.It is used for inspection of the surface defect that people ... judge the defect fastly and precisely. 2.Range of Application:Widely used for test of Chemical industry channel, Aerospace, Automobile industry, Customs ... ,Bending angle 90°;2) Hand wheel operation, has locking device.3Test tube1) Stainless steel braid test tube, waterproof, wear ...