"Counterbores Hexagon" CNS Standards List| Audiovisual,video television | Personal protection | Doors, entrance | Method chemical | Preservative treated | Data Processing | Sodium hydroxide | Supporting Pin | |
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CNS 4807
2022 Edition Counterbores for Hexagon Socket Head Screws and Slotted Cheese Head Screws 柱坑（六角承窩頭螺釘與有槽平頂錐頭螺釘用） |
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CNS 4807
2020 Edition Counterbores for Hexagon Socket Head Screws and Slotted Cheese Head Screws 柱坑（六角承窩頭螺釘與有槽平頂錐頭螺釘用） |
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