The fixed delivery pump and variable delivery motor volume speed-regulating circuit can be called （ ）。
A、Theconstanttorquespeed-regulatingcircuit;
B、Theconstantpowerspeed-regulatingcircuit;
C、Thevariablepowerspeed-regulatingcircuit;
D、nochange
发布时间：2025-08-16 02:14:47
