When {TAIL ~ holes} are used for {HEAD ~ 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 { TAIL ~ holes } are used for { HEAD ~ 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 TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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