It might help if you had the original language! Either you haven't correctly copied it, or it wasn't written by an English speaker. It looks like it should say something like: "In this part we distinguish fiber packaging, including how the fiber is maintained or cooled, and the amplifier packaging, which includes all other associated elements such as the power supply cooling fans" I have no idea what 'fiber' the sentence is referring to. It doesn't really make sense in the same context as 'amplifier', as that would imply it is some sort of electronic equipment. And even more so as to why this fibre should be kept cool, or 'maintained' in some way. But - 'amplifier packaging' is simple. It is the packaging material that is used to pack and protect the amplifier. Packaging material might be cardboard or wooden boxes, and styrofoam, expanded foam or bubble wrap. An amplifier is an electronic component, which could be as simple as part of a home music centre, or even part of a radar installation.

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