Polska wersja
ISO certificates:
Pre-tensioned concrete railway sleepers PS-94 and PS-94M:
Pre-tensioned concrete railway sleepers PS-83:
Concrete tram sleepers:
Turnout bearers :
Level crossing of “Mirosław” type :
Foundation piles:
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ISO 9001:2000
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ISO 14001:2004
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Pre-tensioned concrete railway sleepers PS-94 and PS-94M:
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CNTK Certificate of accreditation No AC 128 - 23/2007
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EC-Type Examination Certificate
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Certificate of admittance to exploitation
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National Certificate of Factory Production Control
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Pre-tensioned concrete railway sleepers PS-83:
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CNTK Certificate of accreditation No AC 9/2010
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EC-Type Examination Certificate
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National Certificate of Factory Production Control
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Concrete tram sleepers:
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TECHNICAL APPROVAL IK AT/07-2011-0244-00 
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Turnout bearers :
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CNTK Certificate of accreditation No AC 24/2007
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EC-Type Examination Certificate
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Certificate of admittance to exploitation
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National Certificate of Factory Production Control
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Level crossing of “Mirosław” type :
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Certificate of admittance to exploitation
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National Certificate of Factory Production Control
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Foundation piles:
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National Certificate of Factory Production Control
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