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Koutim RAL koulè kouvwi bobin asye / koulè kouvwi fèy
Bobin ki gen koulè a kouvri ak youn oubyen plizyè kouch penti likid pa metòd kouch woulo apre pretretman sifas (degrese ak tretman chimik) sou substrati woule cho a, substrati galvanize a, substrati zenk aliminyòm, substrati woule frèt, substrati fèblan ak substrati asye pur. Apre kwit ak refwadisman, fòme pa woule lejè.
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