比例阀阀芯具有比较宽的边缘带有槽口的台肩。
A proportional valve spool therefore has wider lands with notches cut into the edges.
于上架梁的下方固定有顶杆和凹模，于下架梁上安装有其一端部至少有一个肩凸的型芯。
An ejector rod and a female die are fixed at the lower part of the upper beam, and a mold core is mounted on the lower beam. The end of the mold core has at least one shoulder.
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