poultry coop system low egg broken rate full automatic health more than 95% egg rate layers cagelayer chicken cagebattery ... national standard bridge steel cages, white PVC trough, ball-type automatic water equipment, white PVC pipe, 3MM U-type galvanized steel ... 350 kg. With double-dip galvanizing, last 15 years.3).Automatic nipple drinker: 360-degree rotating design, traffic, water enough. ...