Helium is used to pressurize tanks and help push fuel into the engines. Without proper helium flow, the rocket cannot safely fly. Because the upper stage is hard to reach at the launchpad, NASA rolled the stacked rocket back into the Vehicle Assembly Building, the sky-scraping hangar where it was originally put together.
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It's lightweight and super portable as well, making it a no-brainer to stow away in a car or closet, so it's there and not out of reach when you need it the most. And if you just need a power source while camping, it's unobtrusive enough to bring with you on your excursions.
* @returns {number} - 当日价格的跨度，更多细节参见Line官方版本下载
第三百零五条 依照本章规定适用外国法律，不得损害中华人民共和国的公共利益。。safew官方下载对此有专业解读
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