"Transistor Megaphones" CNS Standards List| Plastics − | 1800 MHz | B ISDN | Insulation Resistance | Anodic oxide | Plastics piping | Information technology | Method test | |
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CNS 11763
2017 Edition Transistor Megaphones 電晶體喊話器 |
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CNS 11763
1986 Edition Transistor Megaphones 電晶體喊話器 |
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