Kopar hringstöng/stöng
Stutt lýsing:
Koparstangir er eins konar vinnslustangir sem ekki eru úr járni með góða vinnsluafköst og mikla rafleiðni.Aðallega skipt í koparstangir (kopar-sink álfelgur, ódýrari) og rauðar koparstangir (hærra koparinnihald).
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