比例阀油流量
proportional valve oil flow
差压自保式换向阀
Pressure difference self-protected reversing valve
柴油机调速电控阀
speed regulation electro-pneumatic valve of diesel engine
铲刀侧移止动单向阀
blade sideshift lock check valve
铲刀控制阀安全阀
blade control valve relief valve
铲刀控制阀定心弹簧
blade control valve centering spring
铲刀倾斜单向安全阀
blade tip check and relief valve
铲刀倾斜止动单向阀
blade tip lock check valve
铲刀升降单向安全阀
blade lift check and relief valve
铲刀升降止动单向阀
blade lift lock check valve