... -180. Introduction companyQingdao Yongjian Marine Machinery Manufacture Co., Ltd. Is a company specializing in ship ventilators, ... radiators.Our company is of strong techicians,advanced technology and highly specialized production.The complete range ... shipbuiding,petrochemical industry,machinery and construction.Qingdao Yongjian Marine Machinery Manufacture Co., Ltd.Will be “good market reputation, ...