Double loop high speed vacuum suction system, spread to the surrounding air by the central.

双回路高速真空吸气系统，由中央向四周扩散吸气。

youdao

Double loop high speed vacuum suction system, spread to the surrounding air by the central.

双回路高速真空吸气系统，由中央向四周扩散吸气。

youdao