Put the three heating rods into the very bottom of the three holes of the heating
block, and use M3*4 headless meter screws to fix them. Put the thermistor into the
temperature-detecting hole, and use M3*4 pan cross head washer bolt to fix it.
Connect the wires of heating rod, fan and thermistor, and put the teflon tube into
the quick connect plug. You can use it now.