shanghai coupling equipment co.ltd is the subsidiary of shenyang triocircle machinery corporation.shenyang triocircle machinery corporation affiliated to shenyang Yihe machinery equipment co.ltd is a designed factory engaged in producing coupling in the heavy-duty machinery industry, it is the member factory of China petrochemistry, its products have achieved ISO 9001:2000 certification and passed the provincial authentication. Factory site is located in Qianmin Yuhong district Shenyang China, adjacent with Shenda expressway, it has a good transport service, which can be widely used in some fields like mine, metallury, electric power, petrochemistry and heavy-duty machinery.