[問題] 大理石接縫處發黃
大理石新安裝約兩個月 發現有好幾個地方發黃
剛好都在接縫處 想請問是一開始沒處理好
或是天生就這樣
http://i.imgur.com/J7LOdJC.jpg




有什麼方式可以處理嗎?
感謝各位版友!
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