| 摘要 |
A soldering apparatus containing a preheating zone and a soldering zone, which are adjacent to each other, conveyor means for articles to be soldered, which passes through these two zones, means for introducing nitrogen gas containing oxygen into the preheating zone as an atmosphere gas, means for introducing nitrogen gas into the soldering zone as an atmosphere gas, and means for forming a first nitrogen gas curtain and a second nitrogen gas curtain between both the preheating and soldering zones and on the exit side of the soldering zone, respectively.
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