One-Key opening function(Passage Mode) :Press any digital key to open the lock.

可设定绿色通道功能：按任意数字键即可开门；

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Based on a supposed mathematical model, the calculation of parameters of opening function of Eustachian tube was elaborated.

根据设想的数学模型，探讨了耳咽管开闭功能参数的计算方法。

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Automatic opening function is realized by contra - parallelogram mechanism. Optimal kinematic scheme is obtained by the kinematic and mechanical analysis of the contra-parallelogram.

自动开关门功能是采用反平行四边形机构实现的，针对这一机构的运动特性及力学性能进行了分析并得出最佳的运动方案。

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And for those who follow the global markets, Girard-Perregaux's watch provides a financial function that keeps track of opening and closing times on the stock exchange in New York, London, Hong Kong and Tokyo.

WSJ: World-Time Keeping Wristwatches

He says, while the M1 has changed somewhat since the opening of that first stretch 50 years ago, it still performs its function very well today.

BBC: The M1 celebrates its 50th birthday