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International Standard Category: Bolts, screws, studs

GB/T 944.1-1985    Cross recesses for screws
螺钉用十字槽 ;
Category No.:21.060.10 Valid Status:valid
Issued Organization:National Bureau of Standards Issued Date:1985-08-01
Implemented Date:1986-6-1 Abolished Date:
Superseded Standard.: Superseded Date:
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