PVC Corner length:4m,5m,6m PVC Corner length:4m,5m,6m Advantages: 1)Easy to install, a special way of install make the welds more closely and flatness what overcome the defects caused by other ceiling materials ,such as the welds too large or uneven efter insallation.2)Using hollow structure, the heat transfer coefficient is one-thousandth of aluminum ,it’s useful in heat preservation ,especially ...