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1962”N4ŒŽ “Œ‹ž‚ɂă^ƒ“ƒ^ƒ‹ƒRƒ“ƒfƒ“ƒT[—pƒP[ƒX‚Ì»‘¢”Ì”„i‹ŒÌF”Ñ“cŽY‹Æj
1978”N10ŒŽ _“Þ쌧ìèŽs‚É–{ŽÐˆÚ“]
1983”N5ŒŽ ‰ºžŠ‘ºHê—U’vŽ–‹Æ‚ɂČ»ZŠ‚ÉˆÚ“]
1988”N7ŒŽ Z—F‹à‘®H‹ÆŠ”Ž®‰ïŽÐ‚ÌŽ‘–{ŽQ‰Á
1991”N7ŒŽ ¤†•ÏX Дޮ‰ïŽÐƒGƒXEƒAƒCEƒeƒbƒN
1994”N8ŒŽ ”Ñ“cHêŠJÝ
2002”N4ŒŽ ISO9001:2000”F؎擾@
2003”N4ŒŽ ”Ñ“cHêˆÚ“]–{ŽÐHê‚É“‡
2005”N10ŒŽ ISO14001:2004”F؎擾 
2007”N3ŒŽ ‘åã•xŽmH‹ÆŠ”Ž®‰ïŽÐ‚̃Oƒ‹[ƒvŽQ“ü
2011”N12ŒŽ ISO 9001:2008”FØ@“o˜^”Ô†:491685 QM08
ISO14001:2004”FØ@“o˜^”Ô†:491685 UM
2013”N8ŒŽ ¤†•ÏX Дޮ‰ïŽÐƒG[ƒV[ƒI[‚Ƈ•¹
Дޮ‰ïŽÐƒG[ƒV[ƒI[ NAGANOŽ–‹ÆŠ
2017”N8ŒŽ ISO 9001:2015”FØ@
ISO14001:2015”FØ@

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