ASTM A750-1977(1994)E1 标准详情
- 标准号:ASTM A750-1977(1994)E1
- 中文标题:阻挡区域用钢制通风格栅装置规格
- 英文标题:standard specification for steel air ventilating grille units for detention areas withdrawn 2004
- 标准类别:美国材料与试验协会ASTM
- 发布日期:1977
1.1 This specification applies to air ventilating grille units for detention areas, assembled in part from materials conforming to Specifications A627, A628, and A629. 1.2 The assemblies described herein are intended to provide two types of securit
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