In other words, it is {HEAD ~ an object} of the present invention to remove {TAIL ~ contaminants} or eliminate any bad smell of various contaminated materials 
In other words , it is { HEAD ~ an object } of the present invention to remove { TAIL ~ contaminants } or eliminate any bad smell of various contaminated materials
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH