As indicated in the graphic, the gas giant planets of our solar system - Jupiter, Saturn, Uranus and Neptune - are mostly composed of hydrogen. Image courtesy of NASA.
如图所示，我们太阳系中的气态巨行星——木星、土星、天王星、海王星——大部分是由氢构成的。图片来自。
The paper describes the principle of high pressure gas filling and structure of the system for polystyrene microspheres high pressure hydrogen filling.
概要介绍了微球高压充氢原理及聚苯乙烯塑料微球高压充氢系统。
Second, on account of the block of gas channel we designed a gas channel system, through which the hydrogen can flush the gas channel after the reaction by the control of valves.
针对以前气路堵塞的问题设计并制作了气路系统，使氢气在反应后能够通过阀门控制对气路进行冲洗。
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