In the case of weathering, for example, the weathering of the rock in the edge or surface of the rock mass is the strongest, and the rock weathering is serious, so that the structure becomes loose, and the stone grinding and polishing is difficult to process. It is not bright, and the folding, the compressive strength is low; in the rock or the center of the rock weathered weak, almost no change in rock minerals, fresh rock, dense structure, bright colors.building a deck bench with a back France
http://tonguegroovedecking.com/tongue-groove/2555.html
http://tonguegroovedecking.com/tongue-groove/2552.html