2018CJ/T 522-2018 Grit chamber driving type sand suction machine for sewage treatment
1996CJ/T 3044-1995 The line grit scraper for sedimentation tank in sewage treatment plant
CJ/T 3044-1995 The line grit scraper for sedimentation tank in sewage treatment plant was changed to CJ/T 522-2018 Grit chamber driving type sand suction machine for sewage treatment.