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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 9074.9-1988 |
Cross recessed countersunk head screw and Countersunk serrated external toothed lock washer assemblies 十字槽沉头螺钉和锥形锁紧垫圈组合件 |
China National Standards Countersunk serrated external |
 English PDF |
| GB/T 956.2-1987 |
Countersunk serrated external toothed lock washers 锥形锯齿锁紧垫圈 |
China National Standards Countersunk serrated external |
English PDF |
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