At the same time, by means of {HEAD ~ the nozzle} 40, a rinsing fluid, which contains {TAIL ~ a solvent}, is sprayed against the underside of the cover 20 in order to clean the latter 
At the same time , by means of { HEAD ~ the nozzle } 40 , a rinsing fluid , which contains { TAIL ~ a solvent } , is sprayed against the underside of the cover 20 in order to clean the latter
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH