A user controlled ornamental panel or {HEAD ~ window}, which is useful for a number of {TAIL ~ applications} in which the degree or amount of light passing through the panel is to be controlled 
A user controlled ornamental panel or { HEAD ~ window } , which is useful for a number of { TAIL ~ applications } in which the degree or amount of light passing through the panel is to be controlled
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH