Provide express and air door to door service.
提供速递和空运门到门的服务.
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Stepped control was applied to the regulation on fan speeds and the angle of air door.
汽车空调车内送风系统的风机转速控制和风门转角控制多采用分档控制的形式.
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Air freight service: air to air or sea to air, door to door services.
空运服务: 空空联运及海空联运, 门到门的一条龙服务.
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