... with spiral crimping, thickens of crimping is five times of silo thickness, good sealing performance, convenient for fumigating and disinfection ... construction duration: short construction period, for 1,000 tons silo, it takes 5-6 days, and customer can use ... silo are zinc coated, anticorrosive, long life time. LiYangHaide Machinery Manufacture Co., Ltd-- devoted to development and designing of drying ...