不锈钢天沟用什么材料？不锈钢天沟厚度怎么选择？图片

p1Src=//i02.yizimg.com/uploads_old/430854/2014101015552060_old.jpg&p2Src=//i02.yizimg.com/uploads_old/430854/2014101015552060_old_1.jpg&p3Src=//i02.yizimg.com/uploads_old/430854/2014101015552060_old_2.jpg"

aa