12月美国大陆航空公司在休斯顿测试这个系统并且现在延伸至华盛顿总部，纽瓦克机场和波士顿的洛根机场。
Continental Airlines began testing such a system in Houston in December and is now extending it to Washington National, Newark and Boston's Logan airport.
12月美国大陆航空公司在休斯顿测试这个系统并且现在延伸至华盛顿总部，纽瓦克机场和波士顿的洛根机场。
Continental Airlines began testing such a system in Houston in December and is now extending it to Washington National, Newark and Boston's Logan airport.
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