1,1'-Dimethyl-[2,2'-bipyridine]-1,1'-diium iodide

钴粉, Cobalt powder

钴柱, Cobalt slug

钴箔, Cobalt foil

钴箔, Cobalt foil

钴丝, Cobalt wire

钴丝, Cobalt wire

铜粉, Copper powder

铜粉, Copper powder

铜薄片, Copper flake

铜粒, Copper shot