| 摘要 |
first and second ports(13,16) and chambers(14,15) connected to each other; an edge groove(25) formed at one side of a spool valve(23) land so as to control the flow rate and flow pressure in the first and second ports(13,16), use two ports as input/output ports and obtain same bypass inputs when changing the functions of ports; an orifice groove formed at the side of the edge groove for distribution control; and an oil passage passing through the center of the spool valve to be connected to first and second chambers.
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