![Ivan Perfilyev](http://en.ndt-welding.com/wp-content/uploads/2017/02/photo1-150x150.jpg)
Ivan Perfilyev
Group: Admin
Joined: 2024/07/27
Title: New Member Admin
ASTM A20/A20M - 2015 | 7 years ago | |
API RP 574 - 2016 | 7 years ago | |
Welding positions according to ISO 6947 | 7 years ago |
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