石油天然气钢质管道对接焊缝射线照相及质量分级
Methods for Radiographic Inspection and Quality Classification of Welded Girth Butt Joints in Oil and Gas Steel Pipelines

1993-03-27

船舶钢焊缝射线检测工艺和质量分级
Ship steel weld radiographic testing technology and quality classification

2011-06-15

金属熔化焊对接接头射线检测技术和质量分级
Radiographic examination and quality classification of welded butt joints in metallic materials

2017-11-15

潜艇船体结构焊接质量检验规则和质量分级
Inspection regulation of welding quality for submarine hull structure and quality classification

2013-01-04

粮食信息分类与编码　粮食检验　第3部分:标准方法分类与代码
Classification and codes of grain information—Grain inspection—Part 3:Classification and codes for method of grain quality determination

2004-04-22

Methods of test and classification of quality evaluations for friction welded joints on dissimilar metallic materials
异种金属材料摩擦焊接头的试验方法和质量评定分类

2016-01-01