When {HEAD ~ holes} are used for {TAIL ~ antenna element attachment}, the precise attachment configuration may vary from that of FIG 2b, in which a screw is used to attach an element having a threaded hole 
When { HEAD ~ holes } are used for { TAIL ~ antenna element attachment } , the precise attachment configuration may vary from that of FIG 2b , in which a screw is used to attach an element having a threaded hole
OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH