| "Countersinks 120° " CNS Standards List| Cast iron | Methods chemical | Symbols Indication | Reinforced concrete | Packaged, dry, | Method test | Method test | 600V Grade | | 
| 
 | CNS 231 
			            2017 Edition Countersinks 120° 120°錐坑鑽 |   | |
| 
 | CNS 231 
			            1980 Edition Countersinks 120° 120°錐坑鑽 |   | 
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