尿素高压设备衬里板及内件的 焊接工艺评定和焊工技能评定
Welding procedure qualification and welder performance qualification of cladding and internal for high pressure urea equipments

2002-09-28

Welder Performance Qualification and Training Program
焊工资格认证和培训计划

2019-04-09

Welder Performance Qualification Sheet Metal Test Requirements
焊工性能鉴定钣金试验要求

1994-04-04

Specification for Welding Procedure and Performance Qualification
焊接工艺和性能评定规范

2013-11-21

Specification for Brazing Procedure and Performance Qualification
钎焊工艺和性能鉴定规范

2016-08-05

Requirements for Welding and Brazing Procedure and Performance Qualifications
焊接和钎焊工艺及性能鉴定要求

1995-08-01

INERTIA FRICTION WELDING PROCESS, PROCEDURE AND PERFORMANCE QUALIFICATION
惯性摩擦焊接工艺、程序和性能鉴定

1975-06-30

INERTIA FRICTION WELDING PROCESS, PROCEDURE AND PERFORMANCE QUALIFICATION
惯性摩擦焊接工艺、程序和性能鉴定

1998-03-11

Standard Welding Procedure Specification for Welding Procedure and Performance Qualification for Thermoplastics
热塑性塑料焊接工艺和性能评定的标准焊接工艺规范

2012-04-10

Base Metal Grouping for Welding Procedure and Performance Qualification, 3rd Edition
焊接工艺和性能评定的母材分组 第3版

Standard Procedure for Evaluating the Qualifications of Contracting Firms that Install Polymer Coatings and Surfacings on Concrete and Other Cementitious Substrates
在混凝土和其他胶结基质上安装聚合物涂层和表面的承包公司资质评估标准程序

2015-03-02