This article introduces the gas discharge lamps, such as fluorescence lamp, high pressure sodium lamp and metal halide lamp, and their basic requirements to the electronic ballast.

介绍了荧光灯、高压钠灯以及金属卤化物灯等气体放电灯和其对电子镇流器的基本要求。

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In calibrating the leak, the pressure in the ballast chamber can be precisely controlled in such a way that the standard gas flow through the orifice is close or equal to the leak rate.

在漏孔校准过程中，通过调节稳压室中的压力，很容易使标准气体流量与漏孔漏率非常接近或相等，从而避免四极质谱计的非线性影响。

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The released hydrogen gas exits the fluid storage vessel, is pressurized by a fluid pressurization device, and then stored in a ballast vessel.

释放的氢气输出流体存储容器，由流体加压装置加压，并随后储存在压载容器中。

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Unlike a conventional hot air balloon where the height is controlled by a burner, the gas balloons are filled with hydrogen and controlled by releasing gas to go down and throwing out ballast to go up.

BBC: Wiltshire