Such a device is useful in making {HEAD ~ compound bends} in {TAIL ~ electrical conduit} to ensure that the bends keep each end of the conduit in a common, or vertical plane 
in
Such a device is useful in making { HEAD ~ compound bends } in { TAIL ~ electrical conduit } to ensure that the bends keep each end of the conduit in a common , or vertical plane
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH