产品线长度(product line length) 为一条产品线，共有几种不同的个别产品。 3.
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Digital indication of process parameters such as lay length, line speed and rotation of cabling disk is developed and added to cabling machines, which helps to improve product quality.
研制了绞合节距、线速度、盘绞转速等工艺参数的数字显示表，并加装于成缆机上，有助于提高电缆成缆产品的质量监控。
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