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| Chinese National Standard Category: Refrigeration equipment |
| English Title: | Double-inlet Centrifugal Fan for Unitary Air-conditioning Unit |
| Chinese Title: | 单元式空气调节机组用双进风离心通风机 |
| Standard No.: | JB/T 7221-1994 |
| Category No.: | J73 |
| Issued by: | Ministry of Machine Building |
| Issued on: | 1994-7-18 |
| Implemented on: | 1995-7-1 |
| Status: | superseded |
| Superseded by: | JB/T 7221-2017 Centrifugal fan for heating ventilation and air conditioner |
| Superseded on: | 2018-4-1 |
| Abolished on: | |
| Superseding: | |
| Word Count: | 3000 words |
| Similar Standards: | DB32/T 4330-2022 SB/T 10424-2007 DB31/T 1212-2020 T/CAR 11-2022 T/CSBME 067-2023 GB/T 42347-2023 GB/T 21145-2023 GB/T 21362-2023 GB/T 25861-2023 GB/T 25857-2022 GB/T 41740-2022 GB/T 41703-2022 GB/T 41872-2022 GB/T 41660-2022 YD/T 4153.1-2022 YD/T 4153.2-2022 GB/T 40939-2021 GB/T 18837-2015/XG1-2021 GB/T 7778-2017/XG2-2020 GB/T 9237-2017/XG2-2020 |
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