... railway, river-way, dyke, and the hillside, etc.(2)Before the greensward grows, it prevents the surface of the ... net pad has no any track in the earth for 2 years)(6)Simple to construct: after leveling off the ... 30 cms,10 per square meter nail.(2)the nail length generally for 15 cms( the distance ground), the ... to take to connect.Take to connect the length 2 cms, take to connectA nail should comply with ...