2,2-Dibromo-1-(thiophen-2-yl)ethan-1-one

钴块, Cobalt lump

钴箔, Cobalt foil

钴溅射靶, Cobalt sputtering target

钴棒, Cobalt rod

铜粉, Copper powder

铜粒, Copper shot

铜柱, Copper slug

铜箔, Copper foil

铜箔, Copper foil

铜片, Copper discs