China 'GB/T 26973-2011
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 26973-2011
Specification of solar water heating systems assisted with air-source heat pump(for capacity of water tank more than 0.6 m3) 空气源热泵辅助的太阳能热水系统（储水箱容积大于0.6m3）技术规范
Issued Date:2011-09-29
Implemented Date:2012-08-01
Issued by:
The Standardization Administration of the People's Republic of China
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