<p>A directional control valve is provided which can be switched into one of its switching positions only after the operator has supplied an additional signal.</p>
申请公布号
DE3925771(A1)
申请公布日期
1991.02.07
申请号
DE19893925771
申请日期
1989.08.03
申请人
MANNESMANN REXROTH GMBH, 8770 LOHR, DE
发明人
BEUERMANN, HERBERT, DIPL.-ING., 5207 WINTERSCHEID, DE
