Chapter 5 Hydraulic Control Valves 阀体 芯 弹簧 进油口 出油口 内泄式液控单向 外批式液控单向 Play Play DVD Play DVD DVD Note that the port should be connected to the reservoir when it is not working,otherwise it cannot be returned 13 Homepage List Upwards Downwards Retun ExitChapter 5 Hydraulic Control Valves 13 Note that the port should be connected to the reservoir when it is not working, otherwise it cannot be returned