ASTM标准 ASTM E186-20 Standard Reference Radiographs for Heavy-Walled (2 to 41/2 in.(50.8 to 114 mm)) Steel Castings Designation: E186-20 Standard Reference Radiographs for Heavy-Walled (2 to 41/2 in.(50.8 to 114 mm))... 03月29日E186 阅读全文