crash locator beacon
... 应急储备金 contingency reserve 应急定位信标 crash locator beacon 应急关闭装置 emergency closure ...
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检查客舱应急话筒是否在位且状态良好。检查应急定位信标发射机状态是否正常，固定是否牢靠。
Check cabin emergency speakers for presence and condition. Check emergency locator transmitter for general condition, security.
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