NB/T 20450.4-2017 China
industry
standard english version:
NB
中华人民共和国
行业标准
INDUSTRY
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
NB/T 20450.4-2017
(Pressurized water reactor nuclear power plant nuclear island machinery and equipment welding another specification Part 4: product welding and heat treatment) 压水堆核电厂核岛机械设备焊接另一规范 第4部分：产品焊接和热处理
Issued Date:2017-04-01
Implemented Date:2017-10-01
Issued by:
The Standardization Administration of the People's Republic of China
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