Classification opinions
… blocks (one positive and the other negative) joined by a copper bridge; a DC current gives cooling effect on one side … air conditioning equipment, precision instruments, etc. Adoption : 1965 … 2. Refrigerated outdoor cabinet , designed … on the cabinet roof. Application of GIRs 1, 3 (b) and 6. Adoption : 2017 A Exhaust Fan (roof) B Battery / Equipment …