Method of soldering joints by moving them through {TAIL ~ a target area} on which a stream of {HEAD ~ hot gas} is focused 
Method of soldering joints by moving them through { TAIL ~ a target area } on which a stream of { HEAD ~ hot gas } is focused
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH