Yau bari muyi magana game da "takarda thermal"!Ka'idar takarda ta thermal an lullube shi akan babban takarda foda foda, abun da ke ciki shine phenol mai launi mara launi ko wasu abubuwan acidic, wanda fim ya rabu da shi, a ƙarƙashin yanayin zafi, narkewar fim, foda gauraye launi reactio ...
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