By any standard it is a big piece of kit but nothing as tall as the new Mobile Launcher (ML) serving Launch Complex 39B at NASA's Kennedy Space Center has rolled to that pad since 1975. Modified to support the new Space Launch System, the structure was rolled to Pad B on November 16, first motion occurring at 9.15 am for a 14-hour journey. The 355 ft tall structure stands atop a modified platform which will eventually contain a 60 x 30 ft rectangular cut-out to accommodate various versions of the SLS.
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机译：从任何标准来看，它都是一个很大的工具包，但没有1975年以来服务于NASA肯尼迪航天中心39号发射场的新型移动发射器（ML）那样高。它经过修改可支持新的太空发射系统，该结构于11月16日滚动到Pad B，其第一个动作发生在上午9.15，持续了14小时。 355英尺高的结构竖立在经过改进的平台之上，该平台最终将包含一个60 x 30英尺的矩形切口，以容纳各种版本的SLS。
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