上(shang)海勝緒電(dian)氣(qi)有限公司HRY4護套式電(dian)加(jia)熱器有加(jia)熱芯子(zi)和(he)護套管(guan)組(zu)成，加(jia)熱芯子(zi)用管(guan)狀電(dian)熱元件為熱源，護套管(guan)用碳鋼管(guan)或不銹鋼管(guan)制(zhi)成，它散(san)熱面(mian)積大、傳熱快，接線端子(zi)裝置部分分為普通(tong)型采(cai)用鐵制(zhi)拉(la)伸杯子(zi)型罩殼。
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