ASTM B 787/B 787M 连续绝缘用19股金属线组合单层绞线铜导线标准规范
日期:2012-02-08 10:04
ductors made from round copper wires, either uncoated or coated with tin or lead alloy for insulated conductors for electrical purposes. These conductors shall be constructed with a central core wire surrounded by two layers of helically laid wires, resulting in an outer diameter equal to the compressed-stranded equivalent conductor. (See Explanatory Note 1 and Note 2).
Note 1For the purpose of this specification, combination unilay conductor is defined as follows: a central core wire surrounde
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