Did the Greeks ever adopt foreign equipment ..

[Macedon]

The OP was somewhat sarcastic, in case you're wondering.

Either way, I find it hard to believe they invented pretty much everything.

Actually, I did not! Why would you be sarcastic? It is true that Greeks did not as easily adopt foreign inventions as Romans did (at least according to Polybius, who praises the Romans for this specific trait). On the other hand this does not mean that they did not admit that they also, albeit more reluctantly, did too.