| 摘要 |
Hydraulic change-over valve for injection mould toggle lever clamps In the valve the rod of the operating piston which is slidable in the main cylinder forms a control piston movable in a control cylinder and a pipeline between a multi-way valve and a check-valve opening towards the smaller piston area in the chamber of the cylinder is connected by a control line an annular groove provided with a control edge. The pipeline is connected with the delivery pipeline of an oil pump by a line between cylinder and check valve.
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