Theoretical calculation in this paper is useful for the design of the air button battery.

本文中提供理论计算方法对扣式空气电池的设计具有实用意义。

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Use relays, contactor, button, air switch and travel switch etc low-voltage constitute control circuit called relay contact control circuit.

使用继电器、接触器、按钮、空气开关、行程开关等低压电器构成的控制电路称为继电接触控制电路。

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Though it would rarely be used, NASA maintains a destruct button in the command center at Wallops Flight Facility that can destroy a rocket while it's in the air.

虽然很少会被使用，美国宇航局保持在沃洛普斯自毁在飞行指挥中心设施按钮，可以摧毁火箭，而它在空中的。

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Plus, for last minute trips like New Years, what could be easier than pushing one button for air, hotels and transfers instead of trying to line them up individually?

FORBES: Best Last-Minute New Year's Eve Destinations

Therefore you're focused on just the most basic movements -- a common one involves jumping in the air, tapping the other button for the downward kick, and then tapping it again to fly backwards.

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To make selections in some parts of the menu, you simply push your hand forward in the air, like pushing an imaginary button.

FORBES: Amid Tablet, 3-D TV Deluge At CES, Gesture Tech Could Be The Next Big Thing