các trang web nước ngoài về sửa đàn Guitar

http://www.fretnotguitarrepair.com/repair/acoustic-guitar/action.php
http://www.graphtech.com/products/product-categories
http://www.stewmac.com/How-To/Online_Resources/
http://www.stewmac.com/How-To/Trade_Secrets/
http://frets.com/FretsPages/pagelist.html
http://pianominhthanh.vn/tu-van-kien-thuc-dan-guitar/
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