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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 27664.1-2011 |
Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 1：Instruments 无损检测 超声检测设备的性能与检验 第1部分：仪器 |
China National Standards 1：Instruments |
 English PDF |
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