The dual valves can be used, for example, in {HEAD ~ personal care products} such as toothbrushes and {TAIL ~ razors} to dispense fluids such as dentifrice and shaving aids 
such as
The dual valves can be used , for example , in { HEAD ~ personal care products } such as toothbrushes and { TAIL ~ razors } to dispense fluids such as dentifrice and shaving aids
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH