问题详情

An axial 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

请帮忙给出正确答案和分析，谢谢！