Wenzhou City Stone Factory is a company standard GB823 GB6187 GB52-76 GB55-76 GB6170-GB6175 Quartet welding flange welding hexagonal non-standard products such as professional production and processing, has a complete and scientific quality management system. Integrity, strength and quality of standard factory in Wenzhou City, Stone recognized by the industry. Welcome friends to visit, guidance and business negotiation. (more>>)