A、depending on
B、in relative to
C、regardless of
D、because of
更多“Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid （） pressure.”相关的问题
A、maintaining a steadier speed B、delivering liquids over greater distances C、operating for longer periods of time D、producing a smoother discharge flow
A、A.stuffing boxes eliminate the leakage problems usually associated with other gear pumps B、B.it is not necessary to closely maintain design clearances with this pump C、C.they are essentially self-priming and produce a high suction lift D、D.these pumps are designed with extreme tooth angled
A、variable stroke pumps B、multistage pumps C、positive displacement pumps D、triple-ported pumps
A、variable stroke pumps B、multistage pumps C、positive displacement pumps D、triple-ported pumps
A、Variable volumes can be obtained with gear pumps only by variation of the pump drive speed B、A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft C、The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate D、All of the above
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