请问一句话的翻译，谢谢？ 上下文贴一下吧 the expansion joints should be located in the larger diameter pipe, outside of the reducers that are usually found near the inlet and discharge nozzle, in order to keep the gas velocity within acceptable levels. this is especially important around oxygen compressors where location of expansion joints inside the reducers may place them in areas that need to be constructed of velocity exempt materials. expansion joints are forbidden from being used in areas requiring velocity exempt materials. reducer就是异径管，expansion joint就是膨胀节。让我看不懂的是，第二句话看着像是跟前后两句话矛盾，不知道该怎么翻译才通顺。查看更多
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