... Product: Square ventilating duct--Galvanized iron Our company, Qingdao Haiying Marine Equipment Co., Ltd. is located in the Scientific Technology Park of ... Licang District, Qingdao. We are in the west of ... ,LR,ABS,DNV,BV,GL,RINA,RS,KR,CCS China Classification SocietyNK Nippon Classification Kaiji KyokaiLR Lloyds Register of ...