You can either solder them together properly with a metal strip on the front, or just try positioning the metal correctly inside the case with the cells.
你可以使用前面的金属条将他们焊在一起，或者只是定位好电池盒里面的电池单元的金属条。
Used with the solder wire together, soldering a stainless steel etc metal.
同锡线一起使用，焊接不锈钢等难以上锡的金属。
Reflow Soldering: Melting, joining and solidification of two coated metal layers by application of heat to the surface and predeposited solder paste.
回流焊：应用加热金属涂敷层的表面和预涂焊膏，熔融，连接和凝固两个金属涂层。
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