Pen ruling: Method of producing ruled sheets with a set of pens, under which the sheet travels.

笔划线：用一排钢笔在移动的纸上画上平行线条的方法。

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Ruling machine: machine for drawing rules on paper. there are pen ruling and disc ruling machines.

画线机：在纸上画上线条的机器。有笔画线机和碟画线机两种。

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There are pen ruling and disc ruling machines.

有笔画线机和碟画线机两种。

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