The method 1 wherein in step c there is further included the step of applying the filler under a vacuum to remove {HEAD ~ air} and causing {TAIL ~ the filler} to replace the air inside the exterior tubing 
The method 1 wherein in step c there is further included the step of applying the filler under a vacuum to remove { HEAD ~ air } and causing { TAIL ~ the filler } to replace the air inside the exterior tubing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH