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