Medical equipment, transporting device, housing equipment.

医疗设备，运输设备，住宅设备。

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The invention provides a method and device for transporting natural gas by pipeline.

本发明提供一种通过管道传送天然气的方法和设备。

youdao

The invention provides a method and device for transporting natural gas by pipeline.

本发明提供一种通过管道传送天然气的方法和设备。

youdao