China 'NB/T 51020-2014
' standard english version summary:
NB
中华人民共和国行业标准
INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
NB/T 51020-2014
Specification of powered support used in coal mining by solid backflling 煤矿用固体充填液压支架技术条件
Issued Date:
Implemented Date:
Issued by:
The Standardization Administration of the People's Republic of China
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"NB/T 51020-2014" standard !
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Specification of powered support used in coal mining by solid backflling
GB Standard Chinese Title
煤矿用固体充填液压支架技术条件
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