grating plate of building material 1,usage:advertisement,buildings,etc 2,place of origin:JiaxingZhejiang 3,thinkness:2~6m grating plate of building material1,grating plate is also known as PP hollow board ,which is a green material, is widely used abroad2,PP hollow board because of its widely used, easy to use, also known as Wantong board, which is widely used in advertising background, ...