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Why does the muffle furnace need to be lowered to a low temperature before it can be turned on? - İndüksiyon ərimə sobası, indüksiyonlu qızdırıcı soba, İndüksiyonlu sərtləşmə sobası, Muffle sobası, odadavamlı kərpic, Çin fabriki, təchizatçı, istehsalçı, toptancı
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