36 Sirina Erasitexniko →

This is where it gets interesting. "Erasitexniko" appears to be a transliteration of:

Given the phonetics, "erasitexniko" is almost certainly "ερασιτεχνικό" (amateur). But why would an industrial component be called "amateur"? 36 sirina erasitexniko

Possible explanations:

Alternatively, if the intended word was "elastiko" (elastic), then "36 sirina elastiko" would mean: "36 series elastic" – possibly a rubber band size, a stretch fabric type, or an automotive belt. This is where it gets interesting

In industrial contexts, "36" almost always refers to: In industrial contexts

The term "36 sirina erasitexniko" is not English. It is almost certainly a transliteration of Modern Greek. Let’s break it down:

Thus, "36 Sirina Erasitexniko" most accurately translates to:
"36 [mm or unit] Amateur Siren" or "Model 36 Hobbyist-Grade Warning Siren."