| "Circular Surface" CNS Standards List| Tangential Key | Polyurethane wood | Production test | Method Determination | Sintered stainless | Chemical Reagent | Standard Practice | Method Test | | 
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 | CNS 6090 
			            2017 Edition Circular Surface Boxes for Rigid Steel Conduits 電線用鋼管圓形匣 |   | |
| 
 | CNS 6090 
			            1992 Edition Circular Surface Boxes for Rigid Steel Conduits 電線用鋼管圓形匣 |   | 
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