The line 54 is of small diameter tubing, typically about 1/4 3/8 inch, so that it fits through a small opening in the wall of the oven 24, a small gap in {HEAD ~ the door} of {TAIL ~ the oven}, or the like 
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The line 54 is of small diameter tubing , typically about 1/4 3/8 inch , so that it fits through a small opening in the wall of the oven 24 , a small gap in { HEAD ~ the door } of { TAIL ~ the oven } , or the like
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 OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH