Abstract: A method for controlling implements by means of a hydraulic pressure. A hydraulic pressure is fed from an accumulator to a first hydraulic circuit, after the operating pressure has been once lowered any arbitrary operating pressure or variation of the operating pressure is detected in the course of restoration to an initial set pressure, and a second hydraulic circuit is triggered by a detection signal based on this detection.

Abstract: A secondary pressurization casting method, in which molten metal is injected into and filled in a cavity of a mold and then a secondary pressurizing force is exerted upon the filled molten metal by making a secondary pressurization pin advance within a through-hole formed in the wall of the mold. After commencement of filling of the molten metal in the cavity, the secondary pressurization pin placed at an initial set position is once retreated, and subsequently it is made to advance to pressurize the molten metal. A casting fin produced around the outer circumference of the tip end of the secondary pressurization pin during the period when the molten metal is being injected and filled, is integrated with the molten metal entered into the through-hole as a result of the retreat of the secondary pressurization pin, and subsequently it is pushed into the cavity by the secondary pressurization pin.