中文字幕v亚洲ⅴv天堂,少妇嫩草av无码专区,亚洲精品一区二区三区免费观看,亚洲の无码国产の无码,成人免费一级毛片在线看,亚洲视频在线com

d series of center drive suspension type mud scraper, generally used in sewage treatment engineering radial flow sedimentation pool (without central pier), complete the mud and slag removal work.

this equipment is suitable for small primary settling tank, it has the advantages of simple structure, high dredging efficiency, is an ideal mud discharging device.