求翻译：还记得我们焊接的接收机SA639，很多组的接收机焊接好之后就直接好用了，示波器出来的图形也很漂亮，但是我们的板子，没有焊接的问题，原理图也正确，我们在两台示波器上设置好参数就开始调试，发现我们的接收机没有实现中间的放大功能，而且移相网络的实际参数需要再作调整。是什么意思？

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Also remember that we are welding the receiver SA 639 Group, a lot of receivers after welding better directly on an oscilloscope, better use of the graphics are also very pretty, but there is no welding of our etching, problems, schematic also correctly, and we both set out on an oscilloscope parame

Also remembered we weld receiver SA639, after very many group of receivers weld direct has been easy to use, the oscilloscope comes out the graph very is also attractive, but our board, does not have the welding question, the schematic diagram to be also correct, we establish the good parameter on t

Also remember we welding of receiver SA639, many group of receiver welding good zhihou on directly easy has, oscilloscope out of graphics also is beautiful, but we of Board, no welding of problem, principle figure also correctly, we in two Taiwan oscilloscope Shang set good parameter on began debugg

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