The adjustable mounting of the gas flow tube enables {HEAD ~ optimum operation} of {TAIL ~ the flowmeter} for widely ranging gas flow rates 
of
The adjustable mounting of the gas flow tube enables { HEAD ~ optimum operation } of { TAIL ~ the flowmeter } for widely ranging gas flow rates
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH