供应原装德国力士乐rexroth三位五通换向阀系列CD20-PI26120813002612081310261208132026120813302612091300261209131026120913202612091330Qn=2700l/min26120811002612081110261208112026120811302612091100261209111026120911202612091130中位截止?Qn=2100-2200l/min)