... steel, stainless iron, steel etc.)6.Surface treatment:plating with nickle, silver, gold etc.7.Sample time:3 working ... welding butterfly clutch-packingQuality management system,Our company is confirmity with: GB/T19001-2000-ISO9001:2000STANDARD.About us,Factory view,Workshop, ... after-sales service as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome ...