Also, the membrane 62 completely covers {TAIL ~ the opening} 60 and thus prevents {HEAD ~ the opening} from becoming clogged with grass 
Also , the membrane 62 completely covers { TAIL ~ the opening } 60 and thus prevents { HEAD ~ the opening } from becoming clogged with grass
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH