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1·As the drive circuit board are programmable chips, circuit board repair so hard not just soldering iron and solder work, but also the use of specialized programming equipment.

由于硬盘电路板使用的都是可编程芯片，所以硬盘电路板的修复不仅仅是“电烙铁”和“焊锡”的工作，还需要使用专门的编程设备。

2·Try not to touch the surface of the copper after etching either or you'll get oils on it and it will be hard to solder.

尽量不要接触表面的铜蚀刻后，一方或您获得的将油就资讯科技及将难以焊料。

3·The damage styles of cast-in cutting pick and hard-solder forging cutting pick are analyzedaccording to the comparing experiment under coal mining well.

通过井下采煤对比试验，分析了镶铸截齿与锻造针焊截齿的损坏特点。

4·In some cases it may be necessary to connect metal surfaces by means of a hard spelter solder which fuses at hight temperature.

某些情况下有必要用一种高熔融温度的强锌焊料来连接金属表面。