在此基础上对各折叠角下铰链刚度对动力学特性的影响进行了研究。

Then we studied the influence of the varied hinge stiffness on the dynamic characteristics in case of varied folding angles.

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本文讨论了盘式自动折叠纸盒的折叠角及体板高度等数学问题，为该类包装纸盒CAD开发建立了有效的数学模型。

This article is mainly discuss folding Angle, crease line, body-board's height of auto-bend tray-type carton, which supplies mathematic model for the development of carton package CAD.

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你知不知道当你把名片留与仆人时，为了暗示你来拜访过主人给他请安，你必须折叠名片的哪一角？

Do you know which corner of a visiting card you must fold when leaving it with a footman in order to indicate that you have called on to inquire after the master's health?

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