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“ú–{‰»ŠwH‹Æ(Š”) NIPPON CHEMICAL INDUSTRIAL CO.,LTD.
ŠÖ“ŒŒ]‘‚ÉŽq(Š”) KANTO SODIUM SILICATE GLASS CO.,LTD.
(Š”)ƒgƒNƒ„ƒ} TOKUYAMA CORP.
“ú–{ƒJ[ƒŠƒbƒg(Š”) THE JAPAN CARLIT CO.,LTD.
V“úèc‰»Šw(Š”) NIPPON STEEL CHEMICAL CO.,LTD.
M‰z‰»ŠwH‹Æ(Š”) SHIN-ETSU CHEMICAL CO.,LTD.
º˜a“dH(Š”) SHOWA DENKO K.K.
 
ˆ®ÉŽq(Š”) ASAHI GLASS CO.,LTD.
AGCƒeƒNƒmƒOƒ‰ƒX(Š”) AGC TECHNO GLASS CO.,LTD.
ƒ|ƒbƒ^[ƒYEƒoƒƒeƒB[ƒj(Š”) POTTERS INDUSTRIES INC.
“ú“Œ–aÑ(Š”) NITTO BOSEKI CO.,LTD.
ƒI[ƒEƒFƒ“ƒX ƒR[ƒjƒ“ƒO ƒWƒƒƒpƒ“(Š”) OWENS CORNING JAPAN
“ú–{ƒJ[ƒ{ƒ“(Š”) NIPPON CARBON CO.,LTD.
“ú—§‰»¬H‹Æ(Š”) HITACHI CHEMICAL CO.,LTD.
 
‘¾•½—mƒZƒƒ“ƒg(Š”) TAIHEIYOU CEMENT CORP.
ŽO•Hƒ}ƒeƒŠƒAƒ‹(Š”) MITSUBISHI MATERIALS CORP.
“d‹C‰»ŠwH‹Æ(Š”) DENKI KAGAKU KOGYO K.K.
 
‚i‚e‚dƒXƒ`[ƒ‹iŠ”j JFE STEEL CORPORATION
“ú–{’’“SŠÇ(Š”) NIPPON CHUTETSUKAN K.K.
“ú–{–è‹àH‹Æ(Š”) NIPPON YAKIN KOGYO CO.,LTD.
(Š”)_ŒË»|Š KOBE STEEL,LTD.
 
–¡‚Ì‘f(Š”) AJINOMOTO CO.,INC.
 
ˆ®z––(Š”) ASAHI KOMATSU CO.,LTD.
‰F•”ƒ}ƒeƒŠƒAƒ‹ƒY(Š”) UBE MATERIAL INDUSTRIES,LTD.
(Š”)ŽO‰hƒVƒŠƒJ SAN-EI SILICA CO.,LTD.
”’ÎH‹Æ(Š”) SHIRAISHI KOGYO KAISHA LTD.
Z—F‹à‘®zŽR(Š”) SUMITOMO METAL MINING CO.,LTD.
’•ƒz‹Æ(Š”) CHICHIBU MINING CO.,LTD.
’•ƒÎŠDH‹Æ(Š”) CHICHIBU LIME INDUSTRY CO.,LTD.
ƒiƒXƒGƒ“ƒWƒjƒAƒŠƒ“ƒO(Š”) NAS ENGINEERING CO.,LTD.
“úz‹à‘®(Š”) NIPPON MINING & METALS CO.,LTD.
“ú“Sz‹Æ(Š”) NITTETSU MINING CO.,LTD.
“ú•Záæ‹Æ(Š”) NIPPYOU KOUGYOU CO.,LTD.
ŽO¯áæ‹Æ(Š”) MITSUBOSHI KOUGYOU CO.,LTD.
‘ºŠ~ΊDz‹Æ(Š”) MURAKASHI LIME INDUSTRY CO.,LTD.
‹g‘òΊDz‹Æ(Š”) YOSHIZAWA LIME INDUSTRY CO.,LTD.
 
‰F•”‹»ŽY(Š”) UBE INDUSTRIES,LTD.
ŠÖ¼ƒ}ƒeƒbƒN(Š”) KANSAI MATEC CO.,LTD.
(Š”)ƒNƒ{ƒ^ KUBOTA CORP.
ƒRƒgƒuƒL‹ZŒ¤H‹Æ(Š”) KOTOBUKI ENG.& MFG. CO.,LTD.
‹kH‹Æ(Š”) TACHIBANA KOGYO LTD.
ƒ`ƒˆƒ_ƒE[ƒe(Š”) CHIYODA UTE CO.,LTD.
ç‘ã“cH”Ì(Š”) CHIYODA KOHAN CO.,LTD.
“Œ—mƒGƒ“ƒWƒjƒAƒŠƒ“ƒO(Š”) TOYO ENGINEERING CORP.
ƒg[ƒˆ[ƒ}ƒeƒ‰ƒ“(Š”) TOYO MATELAN CORP.
“ú—§‘¢‘D(Š”) HITACHI ZOSEN CORPORATION
ŒÃ‰Í‹@ŠB‹à‘®(Š”) FURUKAWA CO.,LTD.
ŽO•H‰»H‹@(Š”) MITSUBISHI KAKOKI KAISHA LTD.
(Š”)USS“Œ—m USS TOYO CO.,LTD.
‘º‰ªƒSƒ€H‹Æ(Š”) MURAOKA RUBBER RECLAIMING CO.,LTD.
(Š”)Žç’J¤‰ï MORITANI & CO.,LTD.
(Š”)ŽRŽY YAMASAN CO.,LTD.
ƒ‰ƒTH‹Æ(Š”) RASA INDUSTRIES LTD.