Apparatus and method for mixing and dispensing chemical concentrates at {HEAD ~ point} of {TAIL ~ use} 
Apparatus and method for mixing and dispensing chemical concentrates at { HEAD ~ point } of { TAIL ~ use }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL