DC-type distance calibration test block - American Welding Society standard test block AWS D1.1

DC test blocks, produced by Shandong Ruixiang Mold Co., Ltd., are widely used in various industries such as aviation, aerospace, nuclear power, and high-speed rail, including phased array test blocks, eddy current test blocks, magnetic powder test blocks, and penetration test blocks. The non-destructive testing industry is known as the "first block in China".