-
Kawosh karan daghigh co.
-
Iran water & electrical equipment engineering co.
-
Nazeran eng. co.
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Tuba co.
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Amirkabir paint research institute (METRA)
-
Iranian co.
-
Nazeran yekta co.
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Zang azmoon co.
-
Arya – sgs co.
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Iranian standard & quality inspection co.
