单项选择题
A.superheated B.saturated C.condensed D.convected
An axial轴向 piston pump differs from a radial piston pum...
单项选择题An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.
A.radially from the shaft B.parallel to each other and to the shaft C.parallel to each other but at a right angle to the shaft D.at an angle to each other and to the shaft
The usual number of single-acting pistons used in a var...
单项选择题The usual number of single-acting pistons used in a variable stroke axial-piston pump is （）.
A.3 or 5 B.5 or 7 C.7 or 9 D.9 or 11
The heat identified by only a change in temperature is ...
单项选择题The heat identified by only a change in temperature is known as （）.
A.sensible heat B.latent heat C.total heat D.residual heat
