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BD5EPA:光纤缆线的尾纤,里面有金属丝吗? (2018-01-02 20:55)
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bd1hp:可买涤纶绳也叫弹丝绳,做建筑施工安全网用的,特点是耐晒,建材市场有卖15元一斤,约300米。 (2018-01-09 15:33)
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