vacuum lead meaning in English

抽真空管道

Heater adopts high quality stainless steel , alloy heating wire , electrical melting mgo powder etc . to make the heating elements after passing advanced technology such as coiling wire , shrinking tube , removing humidity and sealing etc . the connection between flange and heating tube adopts hydrogen arc welding and vacuum lead welding to guarantee the heater without leakage under high voltage
加热器采用优质不锈钢管合金加热丝电熔氧化镁粉等材料,经绕丝缩管排潮封口等先进的生产工艺制造而成的发热元件法兰与电热管的联接采用氩弧焊及真空钎焊，保证了加热器在高压下的不渗漏。