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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 34187-2017 |
Units and symbols for urban heating 城镇供热用单位和符号 |
China National Standards Urban heating unit |
 English PDF |
| GB/T 28185-2011 |
Urban heating unit with heat exchanger 城镇供热用换热机组 |
China National Standards Urban heating unit |
English PDF |
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