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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 33725-2017 |
Watch cases and accessories—Tests of the resistance to wear, scratching and impacts 表壳体及其附件 耐磨损、划伤和冲击试验 |
China National Standards impacts |
 English PDF |
| GB/T 20138-2006 |
Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) 电器设备外壳对外界机械碰撞的防护等级（IK代码） |
China National Standards impacts |
English PDF |
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