I used a propane torch and a sauce pan and in doing so, I didn't get the solder hot enough or consistent throughout, and I also didn't preheat the mold.

我用丙烷火炬和酱油潘并在这样做，我没有得到足够的热焊或一致，而且我也没有预热模具。

youdao

The fuel of the torch is propane, which is a common fuel which also comes with a low price.

燃料的火炬，是丙烷，这是一种常见的燃料，也与以低廉的价格。

youdao

Williams roams Connecticut's woods armed with a propane torch to incinerate clumps of Japanese barberry, an invasive plant species that chokes off native vegetation and provides a favorite habitat for ticks.

WSJ: This Season's Ticking Bomb