poultry house 1. service life of the cage is 15 years 2, ... per set1.International Q235 bridge steel ,white PVC manger, ball valve type automatic water equipment, white PVC water pipe, 3MM U type ... cage is zero, damage rate of eggs is zero.3.White PVC trough, full new PVC material, resists compression, heat- ... http://www.yxbreed.com.cnTrade Manager cn220194274 Hign quality poultry house equipment