1-(Prop-2-yn-1-yl)piperazine

铬溅射靶, Chromium sputtering target

钴片 , Cobalt pieces

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