钴粉, Cobalt powder

钴柱, Cobalt slug

钴箔, Cobalt foil

钴箔, Cobalt foil

钴丝, Cobalt wire

钴棒, Cobalt rod

铜粉, Copper powder

铜粉, Copper powder

铜粒, Copper shot

铜卷片, Copper turnings