Manual push-and-pull device facilitates customers to access to ventilation and light when fans are not required.

手动推拉装置。方便客户在无需使用风机时也能透风采光。

youdao

Manual push-and-pull device facilitates customers to access to ventilation and light when fans are not required.

手动推拉装置。方便客户在无需使用风机时也能透风采光。

youdao