中华人民共和国国家标准 Useful info Yizuo Media

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Useful info

China

Science and technology

中华人民共和国国家标准

zhong1 hua2 ren2 min2 gong4 he2 guo2 guo2 jia1 biao1 zhun3

1 3 years ago

First author

Guobiao Standard/China National Standard/GB/国家标准/国标

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8 years ago 3 years ago