The invention is directed to {HEAD ~ a modular apparatus} for preparing chemical compositions at the point of {TAIL ~ use}, e.g., a customers plant 
The invention is directed to { HEAD ~ a modular apparatus } for preparing chemical compositions at the point of { TAIL ~ use } , e.g. , a customers plant
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH