With the direct coupling approach, no tools support exists, and application developers have to deal directly with the details of data management.

对于直接耦合方法，不存在工具支持，并且应用程序开发人员必须直接处理数据管理的细节。

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The suction is provided by a suction unit of the side channel blower type, with direct coupling between the fan and the motor shaft and no transmission system.

吸尘系统是旁路鼓风马达，是由风扇和马达轴直联而成，没有传输装置。

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