If the wall is not made of concrete, the area where the sleeve goes through should be concreted, and the concreted diameter should be 200mm more than the wing ring diameter. The sleeve should be fixed in the wall at one time and the stuffing material should be…
1.reasonable structure 2.materia:carbon steel Q235-A 3.standard:S312.02S404 4.professional staff 5.design service 6.OEM service 7.discount of large quantity
