Building Steel Mesh的意思|示意

建筑钢筋网 Baidu, 20, before the keyword "steel mesh", "welding steel mesh", "building steel mesh" are ranked in the Home, "welded steel" came in before 14, 20, a major adjustment, "steel mesh" "welded steel" fell more than 200, "welded steel mesh," fell to the second page, "building steel mesh" also fell into the sixth page, so far did not recover, I would like to ask me, I lost so many reasons for ranking ? My site has reasonable content? Keywords accumulation title count it?