For example, the skirt valve can be mounted about {TAIL ~ a stem} or {HEAD ~ post} to create a 360 degree opening that is less likely to be jammed by solid items 
For example , the skirt valve can be mounted about { TAIL ~ a stem } or { HEAD ~ post } to create a 360 degree opening that is less likely to be jammed by solid items
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH