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ASME(¹Ì±¹±â°èÇÐȸ)  American Society Mechanical Engineers
ASTM International(¹Ì±¹Àç·á½ÃÇèÇÐȸ)  American Society for Testing and Materials
UL(¹Ì±¹º¸ÇèÇùȸ¾ÈÀü½ÃÇè¼Ò)  Underwriters Laboratories Inc.
API(¹Ì±¹¼®À¯Çùȸ)  American Petroleum Institute
IEEE(¹Ì±¹Àü±âÀüÀÚ±â¼úÀÚÇÐȸ)  the Institute of Electrical and Electronic Engineers