ASTM A640-1997(2014) 标准详情
- 标准号:ASTM A640-1997(2014)
- 中文标题:标准规格镀锌镀锌钢丝链Messenger的支持图8电缆
- 英文标题:Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable
- 标准类别:美国材料与试验协会ASTM
- 发布日期:08 January 2014
Scope 1.1 This specification covers two sizes of extra-high-strength grade of concentric-lay steel wire strand, composed of seven, zinc-coated steel wires, specifically intended for use as the supporting messenger in Figure 8-type communicatio
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