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1·The flywheel can be assembled by a welding, hard soldering, soft soldering, binding or interfering method.

可以通过焊接、硬钎焊、软钎焊、粘结或干涉方法装配成飞轮。

2·Although it requires the removal of two odd-sized screws, the battery really isn't that hard to replace. Thumbs up for no soldering!

尽管需要取出两个非标准尺寸的螺丝，要更换电池并不是很难。好在没有焊接起来。

3·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。