无码精品免费少妇高潮特黄l_99国产精品成人九色_国产91蜜臀视频在线免费看_人妻少妇精品无码专区二区_国产成人精品无码免费播

Physical properties of metallic materials detection: capable of detecting metal material mechanical properties, to do tensile test, bending test, impact test; surface hardness testing of metallic materials, including: Brinell hardness, Vickers hardness, Rockwell hardness, metallographic microscope inspection and evaluation of steel microstructure and determination of metal average grain degree, determination of steel decarburization layer depth.

Nondestructive testing: with X - ray detection, ultrasonic testing, penetration testing and magnetic particle testing