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GB/T 3836.35-2021爆炸性環(huán)境第35部分：爆炸性粉塵環(huán)境場(chǎng)所分類(lèi)Explosive atmospheres. Part35:Classification of ar...2022-03-14

GB/T 4942-2021旋轉電機整體結構的防護等級(IP代碼) 分級Degrees of protection provided by the integral design o...2022-03-14

GB/T 15628.1-2021中國動(dòng)物分類(lèi)代碼第1部分：脊椎動(dòng)物Classification codes of China fauna. Part 1: Vertebrates...2022-03-14

GB/T 28577-2021冷鏈物流分類(lèi)與基本要求Classification & basic requirement for cold chain logistics2022-03-14

GB/Z 40869-2021廢電機分類(lèi)及代碼Classification and code of waste motor2022-03-14

ASTM E2522-2007(2013)健康分類(lèi)用質(zhì)量指標指南Standard Guide for Quality Indicators for Health Classifications...2022-03-14

修訂后的《防污公約》和《國際海運安全公約》規定的行業(yè)危險分類(lèi)方法Industry approach to hazard classification u...2021-09-09

Analysis and Discrimination of the Relevant Notions of Bilingualism and Bilinguals2020-12-06

語(yǔ)言分類(lèi)系統的設計2020-11-03

Fractal classification and natural classification of coal pore structure based on migration of coal 2020-06-12

中國生態(tài)交錯帶2020-06-30

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