... scientific design and efficient working,solid structure,lifetime 20 years automatic poultry cagesit is high density raising nurse resources and ... steel wire 2. surface treatment:Galvanization,we have most advanced Automatic Galvanization Line for Poultry Equipment manufacture all over the world3 ... crib we produce is made of Gavanized angle iron,the Loading Capacity of each crib:more tha 60KG/PC,just ...