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  • ASTM D5030/D5030M-2021Standard Test Methods for Density of In-Place Soil and Rock Materials by the Water Rep...2022-04-05
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  • GB/T 8897.1-2021原电池 第1部分:总则Primary batteries. Part1:General2022-04-05
  • BS ISO/IEC 8825-6-2021Information technology. ASN.1 encoding rules. Registration and application of PER enco...2022-04-05
  • CJJ/T 310-2021高速磁浮交通设计标准Standard for design of high-speed maglev transit2022-04-05
  • T/ZZB 2417-2021聚偏氟乙烯中空纤维帘式膜组件2022-04-05
  • ISO 22735-2021道路车辆 车道保持辅助系统性能评价的试验方法Road vehicles — Test method to evaluate the perfo...2022-04-05
  • HG/T 5979-2021绿色设计产品评价技术规范 硫酸铜2022-04-05
  • GB/T 786.1-2021流体传动系统及元件 图形符号和回路图 第1部分:图形符号Fluid power systems and components. Graphi...2022-04-05
  • DIN EN 13603-2021Copper and copper alloys - Test methods for assessing protective tin coatings on drawn roun...2022-04-05
  • GMW 18431-2021Quick Plastic Forming Aluminum Sheet (Issue 1; English)2022-04-05