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比较GB/T11345-2013《焊缝无损检测超声检测技术、检测等级和评定》标准和GB/T11345-1989标准的异同点。
Comparison of GB / T11345-2013 “non-destructive testing of welds ultrasonic testing technology, testing levels and assessment” standard and GB / T11345-1989 standards similarities and differences.