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ASTM F3515-2021用于生物医学和组织工程医疗产品应用的猪纤维蛋白原作为原材料的鉴定和检测的raybet雷电竞电竞app下载地址指南Standard Guid...2022-03-31

ISO 13775-1-2021Thermoplastic tubing and hoses for automotive use — Part 1: Non-fuel applications2022-03-31

GB/T 3639-2021冷拔或冷轧精密无缝钢管Seamless cold-drawn or cold-rolled steel tubes for precision application...2022-03-22

GB/T 40515-2021船舶和海上技术船用超低温截止阀设计与试验要求Ships and marine technology. Globe valves for u...2022-03-18

GB/T 21973-2021YZR3系列起重及冶金用绕线转子三相异步电动机技术条件YZR3 series wound-rotor three-phase induct...2022-03-14

GB/T 40703-2021太阳能中温工业热利用系统设计规范Design specifications of medium temperature solar heating sys...2022-03-14

ASTM F1713-2008(2013)外科植入物用锻制钛-13铌-13锆合金的规格(UNS R58130)Standard Specification for Wrought Ti...2022-03-14

ASTM F562-2013外科植入物用锻制35钴-35镍-20铬-10钼合金规格(UNS R30035)Standard Specification for Wrought 35Co...2022-03-14

ASTM D1250 ADJ V9-1980(1997)e1Standard Guide for Petroleum Measurement Tables Petroleum Measurement Tables V...2022-03-14

Process-oriented Approach to Motivating Learners:Its Implications and Applications2020-11-22

生物质气化技术发展分析2020-06-12

生物质气化技术发展分析2020-03-23

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