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 {TAIL ~ steam} or by flooding with ozonated water 
by spraying with
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 { TAIL ~ steam } or by flooding with ozonated water
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH