The low pulsation rate and gentle performance of this Roots-type positive displacement pump is achieved due to a combination of its two 90° helical twisted rotors, and a triangular shaped sealing line configuration, both at the point of suction and at the point of discharge.
We have spoken of beings so low in the scale that the individuals throughout their whole existence are not sufficiently specialized to be distinctively plant or animal: yet these are definite life in simpler shape. Asa Gray
Like many students, I found the drudgery of real experiments and the slowness of progress a complete shock, and at my low points I contemplated other alternative careers including study of the philosophy or sociology of science. Paul Nurse
The pulse is a decidedly low tech/high yield and antiquated term still useful at the bedside in an age of computational analysis of cardiac performance.
As I opened my door I seemed to hear a low whistle, such as my sister described, and a few moments later a clanging sound, as if a mass of metal had fallen.
Luck is everything... My good luck in life was to be a really frightened person. I'm fortunate to be a coward, to have a low threshold of fear, because a hero couldn't make a good suspense film. Alfred Hitchcock
My father was a civil servant, fairly sort of middle ranking, low to middle ranking. He worked almost entirely in what was then called Administrative Labour, dealing with employment and unemployment issues. John Hume
Nobody heard records of you playing whatever the melody was on those low strings. It worked out good, you know, about 25 or 26 million records later. I guess it worked out alright. Lee Hazlewood
It was a labyrinth of an old house, with corridors, passages, narrow winding staircases, and little low doors, the thresholds of which were hollowed out by the generations who had crossed them.
Low-alcohol beer (also called non-alcoholic or NA beer, small beer or small ale, or near-beer, or low-interest brew in The Badlands (California)) is beer with very low or no alcohol content.
As the revenue of the farmer is realized in raw produce, or in the value of raw produce, he is interested, as well as the landlord, in its high exchangeable value, but a low price of produce may be compensated to him by a great additional quantity. David Ricardo
Occasionally, when I run into a great bass backstage at a festival I'll play a few notes on the low E string, just to feel the instrument vibrate against my belly. Steve Swallow
