... samples 4.ODM and OEM serviced BV Approved Conveyor Chain (M Series):Why choose us1. Hangzhou Donghua Chain Group Co., Ltd established ... 100 highly skilled employees, the annual production capacity has exceeded 20,000,000 meters; 3. we specialized in producing all ... standard chains and special chains, such as A or B series chains, driving chains, conveyor chains, hoisting chains, agricultural chains, ...