Took a long time running of the machine, shall not be used directly touch the hand module of heat sink and other heating device, lest burns.
在机器运行较长时间时，不得用手直接触摸模块上的散热片和其它的发热器件，以免烫伤。
A class, and I can't wait to start playing with, and then put the tube in the hot water heating, the exciting moment is coming, but for a long time not see a little action.
一上课，我就迫不及待的开始摆弄，然后把试管放进热水中加热，激动人心的时刻就要到来了，可是等了半天不见一点动静。
When the furnace has been using for quite a long time, if it is discovered that the heating current cannot be increased even though the heating power knob is adjusted clockwise to the limit.
在电炉使用相当长时间后，如发顺时针方向调节加热功率调节钮至最大位置，加热电流仍上不去。
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