... produce lines, one for galvanized steel sheet in coil, second for galvalume steel sheet in coil, third for color prepainted steel sheet in coil, we obtain ISO ... also we engage in trade and agent for big steel factory of China, such as Baogang, Laigang, Shagang, Taigang and etc. ... our corporation for guiding work and talking business.4. CertificateCorrugated steel plate zinc corrugated roofing sheet