波导元件型号命名方法
Type designation system for waveguide components
1981-01-01
BS EN 125000-1998
Harmonized system of quality assessment for electronic components. Generic specification: cores made of ferrite materials
电子元件质量评定协调体系 总规范:铁氧体材料制成的磁芯
1998-03-15
DIN 1988-2
Drinking water supply systems; materials, components, appliances, design and installation (DVGW code of practice)
饮用水供应系统；材料、组件、设备、设计和安装（DVGW实践规范）
1988-12-01
DIN 1988-200
Codes of practice for drinking water installations - Part 200: Installation Type A (closed system) - Planning, components, apparatus, materials; DVGW code of practice
饮用水装置的实施规程.第200部分:A型装置（封闭系统）.规划 部件 装置 材料；DVGW业务守则
2012-05-01
DIN 1988-20-DRAFT
Draft Document - Codes of practice for drinking water installations - Part 20: Installation type A (closed system) - Planning, components, apparatus, materials; DVGW code of practice
文件草案——饮用水装置实施规程——第20部分:A型装置（封闭系统）——规划、部件、仪器和材料；DVGW业务守则
2008-07-01
ASTM C1858/C1858M-24
Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions
承受地震地面运动区域用石膏板产品的直接悬挂悬挂T型天花板系统的设计、施工和材料要求的标准实施规程