In the contact tower, a new type of filter was used to prevent blocking.

本文选用了一种新型的填料，克服了接触氧化塔易发生堵塞的缺点。

youdao

In the contact tower, a new type of filter was used to prevent blocking.

本文选用了一种新型的填料，克服了接触氧化塔易发生堵塞的缺点。

youdao