Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 40535.1-2021 |
Test methods of continuous nitride ceramic fibers—Part 1:Nitrogen content 连续氮化物陶瓷纤维测试方法 第1部分:氮含量 |
China National Standards 1:Nitrogen |
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GB 11666.1-2012 |
Health protection zone for fertilizer industry - Part 1:Nitrogen fertilizer industry 肥料制造业卫生防护距离 第1部分:氮肥制造业 |
China National Standards 1:Nitrogen |
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