the third step of arranging {HEAD ~ another member} on the joining layer and heating the joining layer to not less than {TAIL ~ a temperature} which is a melting point of boron oxide for a predetermined period of time 
the third step of arranging { HEAD ~ another member } on the joining layer and heating the joining layer to not less than { TAIL ~ a temperature } which is a melting point of boron oxide for a predetermined period of time
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH