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GB/T 948-88 开槽沉头不脱出螺钉

(UDC 621.882.2 | 代替 GB948-76)

Slotted countersunk head screws with waisted shank

GB/T 948-88 开槽沉头不脱出螺钉GB/T 948-88 开槽沉头不脱出螺钉