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(ÇØ´ç »çÀÌÆ®ÀÇ ´ã´çÀÚ²²¼­ ÀúÈñ ÀÚ·áÀÇ ¼öÁ¤ º¸¿Ï ¿ä±¸°¡ ÀÖÀ» ½Ã Áï½Ã ¹Ý¿µÇÏ¿© µå¸®°Ú½À´Ï´Ù.)

http://www.flexibleduct.org/
Flexible duct Á¦Á¶ÀÚµéÀ» À§ÇÑ trade Association.
http://www.forms.org/
Insulating Concrete Forms Association. (ICFA).
http://www.galvanizeit.org/
American Galvanizers Association (AGA)
http://www.gardnerweb.com/
GARDNER PUBLICATIONS .±Ý¼Ó ¼¼°ø¹°À̳ª ¸¶¹«¸®°øÁ¤°ú ÀÚµ¿Â÷°ø¾÷¿¡ ´ëÇÑ Á¤º¸ Á¦°ø.
http://www.glass.org/
National Glass Association.(NGA)

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