덕양 에너젠(Deokyang Gas Corporation)http://www.deokyang.com DAN 科學 주식회사(Dan Science Co., Ltd.www.dan-science.co.jp 大陽日酸 주식회사(Taiyo Nippon Sanso Co., Ltd.) 關東電化工業 주식회사(Kanto Denka Kogyo Co., Ltd.www.kantodenka.co.jp Takachiho Trading Co., Ltd. Nippon Q'Tec. Co., Ltd.www.nqt.co.jp YUTAKA Engineering Inc. Scott Specialty Gases(USA)www.scottgas.com Voltaix, Inc.(USA)www.voltaix.com Mass-Vac, Inc.(USA)www.massvac.com C&M International Inc.(USA) JMB ASIATIC Commercial Corp. Prax AIR(USA) ETS A. Van Lerberghe NV AMRITLAL Harold Scholz & Co. GmbH WHA WLEY & SON MESA(USA) Rill Trading(China) CJICHEM Semiconwst China Jiangsu Int'l Ultramarine & Pigments. Amritial chemaux shanghai Xin Long trading Swada(London) Limited James M.Brown Ltd W.Hawley & Son Limited Shanghai chemicals Linde Gas Uk Ltd. d
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