A solar heat collector made up of several metal plates, {HEAD ~ each} bent to provide {TAIL ~ a first planar portion} and a second planar portion at substantially 90°, with a flanged hole through each first portion 
bent to provide
A solar heat collector made up of several metal plates , { HEAD ~ each } bent to provide { TAIL ~ a first planar portion } and a second planar portion at substantially 90 ° , with a flanged hole through each first portion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL 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