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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 40791-2021 |
Non-destructive testing of steel tubes—Radiographic testing of the weld seam of welded steel tubes for the detection of imperfections 钢管无损检测 焊接钢管焊缝缺欠的射线检测 |
China National Standards tubes—Radiographic |
 English PDF |
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