Yiwu Ocean Import & Export Co., Ltd is located in Yiwu of ZheJiang Province where commodity Economy is well-developed, which is an export-oriented enterprise with years of experience in operating international machine market, win-win co-operation with Tongji university, relying on its technological advantages and industrial advantages in fields of environmental protection, mechanical manufacture, R&D of devices, the main business including air separate system (PSA nitrogen generator, PSA oxygen generator, VPSA oxygen generator and cryogenic equipment), sewage disposal devices (mud...