Normally, {TAIL ~ iron powder}, such as reduced iron powder, sprayed iron powder, or {HEAD ~ electrolytic iron powder}, is used 
Normally , { TAIL ~ iron powder } , such as reduced iron powder , sprayed iron powder , or { HEAD ~ electrolytic iron powder } , is used
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH