1.We have 22 years history 2.ODM and OEM serviced 3.For free samples 4.International Approvals:SGS /BV /ISO /DQS /API /AAA Double Pitch Conveyor Chain with AttachmentWhy choose us ?1. Hangzhou Donghua Chain Group Co., Ltd established in 1991, we have 5 subsidiaries in china and also have 6 subsidiaries abroad; 2. we covering a production area of 200,100 square meters, have more than 1,800 sets of ...