Which interface is gevivide9 Heart 4d probe?

What you should say is an oblique probe. The oblique probe itself usually has an angle or k value. If you have a boat-shaped test block, there is a K-value area near the transparent circular hole. Find the highest wave and hit it. If the machine itself has no k value. Need an angle. All you have to do is find a transverse perforation and find the highest wave, which is its angle value.