集尘室(1)的主体(2)以及第一和第二级旋风器(3,4)的内衬使用无孔耐磨材料，例如混凝土。

For the lining of the main body (2) of the dust chamber (1) and first and second stage cyclones (3, 4) are used the non-porous and wear proof material, for example concrete.

youdao

集尘室(1)的主体(2)以及第一和第二级旋风器(3,4)的内衬使用无孔耐磨材料，例如混凝土。

For the lining of the main body (2) of the dust chamber (1) and first and second stage cyclones (3, 4) are used the non-porous and wear proof material, for example concrete.

youdao