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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 37549-2019 |
Technical code for relaying protection of generator-transformer unit in large capacity nuclear power plant 大型核电发电机变压器组继电保护技术规范 |
China National Standards Technical code city |
 English PDF |
| GB/T 51168-2016 |
Technical code for routine maintenance and rejuvenation engineering of historic trees in the city 城市古树名木养护和复壮工程技术规范 |
China National Standards Technical code city |
English PDF |
| GB/T 29158-2012 |
Technical code for solar-plus-supplementary water heating system (tank capacity more than 0.6m3) 带辅助能源的太阳能热水系统(储水箱容积大于0.6m3)技术规范 |
China National Standards Technical code city |
English PDF |
| GB 50494-2009 |
Technical code for city gas 城镇燃气技术规范 |
China National Standards Technical code city |
English PDF |
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