variable displacement pump
可变排量泵
变量泵
变量柱塞泵
变排量泵
比例变量泵
可变容积泵
恒动率变量泵
可调流量泵
eyword: Variable displacement pump
Variable displacement pump of constant pres sure
Variable displacement piston pump
double displacement pump
screw displacement pump
rotary displacement pump
mercury displacement pump
constant power operation
constant power factor control
constant power speed regulation