First, the clay and the foaming agent are blended with {HEAD ~ the granulated blast furnace slag} which is {TAIL ~ a principal component} of the fixing carrier of the present invention 
is
First , the clay and the foaming agent are blended with { HEAD ~ the granulated blast furnace slag } which is { TAIL ~ a principal component } of the fixing carrier of the present invention
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH