网线数目：网片上，每厘米或每时内的线条数目。线条越多，印刷品越精细。

Screen ruling: the number of lines per cm or per inch on a screen. The greater the number of lines, the finer the printing will be.

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电子传发网点在扫描机的输出介体上能以多种不同的网点形状和网线数目直接造成半色调网点的能力。

Electronic dot generation the ability of an output scanner to generate half-tone dots directly on the output medium in a variety of screen rulings and forms.

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