... output:140W Zhejiang Rongrong Industrial Co., Ltd., founded in 2007, integrates the research, development, manufacture and sale of ... the certifications of ISO9001:2000, ISO1 4001:2004, CE and GOST. Strict quality control, innovative product R&D and international marketing ... test under the pressure for the individual fin and for the fin group, well guarantee the safty and reliability of the products5. ...