The sterilization of the external surfaces can occur with {HEAD ~ a suitable means}, for example by spraying with a biocidal chemical, with H2 O2, with steam or by flooding with {TAIL ~ ozonated water} 
The sterilization of the external surfaces can occur with { HEAD ~ a suitable means } , for example by spraying with a biocidal chemical , with H2 O2 , with steam or by flooding with { TAIL ~ ozonated water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL