"Counterbores Hexagon" CNS Standards List| Method 65 | Fire Bricks | Knife File | Method Test | Method Determining | Warning Buzzers | Method Test | Gas mixers | |
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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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