excessive heating

基本解釋

Avoid excessive heating of valve.
不要對閥門過度加熱。
Apply flame to valve at base of socket. Heat uniformly, sweeping flame from valve to tube until flux on valve becomes quiet. Avoid excessive heating of valve.
在閥門的套筒底座用火焰進行烘烤。加熱要均勻，用火焰對閥門及琯道進行火焰烘烤的過程要延續(xù)到閥門上的銲劑不再發(fā)出聲音。不要對閥門過度加熱。
Also, it's important to choose a switch card with low contact resistance to avoid excessive heating that can cause contact failure by welding the contacts together.
此外，選擇具有低接觸電阻的開關(guān)卡也很重要，以避免産生過多的熱量，造成觸點粘結(jié)在一起，從而引起故障。