The discharge end of the teat cup may be fitted with {HEAD ~ a shut off valve} which can be actuated to prevent {TAIL ~ ingress} of treatment and cleansing fluids into the milk tubes during the treatment and cleansing cycle 
actuated to prevent
The discharge end of the teat cup may be fitted with { HEAD ~ a shut off valve } which can be actuated to prevent { TAIL ~ ingress } of treatment and cleansing fluids into the milk tubes during the treatment and cleansing cycle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH