The utility model discloses a collapsible ruler, which is formed by the combination of two rulers glidingly assembled into integration; the two rulers face each other and are parallel mutually.
本实用新型公开了一种可伸缩尺，该伸缩尺由两个滑动装配成一体的直尺组合而成，两直尺相互正对且相互平行。
By establishing the mathematical model of motion curve combination, this paper discusses the combination methods of parallel-indexing-cam curves in paper-feeding mechanism of die-cutting machine.
通过建立拼接运动规律的数学模型，论述了模切机输纸机构中平行分度凸轮运动规律的拼接方法。
By establishing the mathematical model of motion curve combination, this paper discusses the combination methods of parallel-indexing-cam curves in paper-feeding mechanism of die-cutting machine.
通过建立拼接运动规律的数学模型，论述了模切机输纸机构中平行分度凸轮运动规律的拼接方法。
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