Consideration in Negotiable Instrument has specialty in existing time, including two situations: (1) the consideration relation should exist while Negotiable Instrument obtained.

票据对价在存在时间上有特殊性，包括两种情况：（1） 取得票据时存在对价关系即可；

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Analyses of three existing types of instrument verification system.

分析了三种现有的仪表检定系统类型。

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To the problems existing in the experiment of coefficient of viscosity with ND-2 instrument coefficient of viscosity, some improvements on the instrument are given.

针对ND - 2型液体粘滞系数仪测定液体粘滞系数实验中所存在的问题，探索该实验仪器的改进方法。

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You can make the instrument very much like an existing instrument or you can make it very different.

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