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最令航天业担忧的是钇供应紧张。钇是高温防护涂层中的关键成分，可防止发动机和涡轮在高温下“熔化”，一旦无法定期施涂相关涂层，发动机便无法正常服役。
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US citizens should “consider leaving Israel while commercial flights are available”, the Department of State advisory added. It also urged against travel to Israel.，推荐阅读Line官方版本下载获取更多信息
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