A two-way lock, which is connected by two hydraulically controlled tubular one-way valves, is connected side by side to control the movement of hydraulic support metal structures that withstand operating resistance. It has two threaded safety valve interfaces, which can be installed by two safety valves, adjusting the safety valve opening pressure to protect the metal structures from working resistance not exceeding the rated value. Specifications Rated Pressure: Rated Flow Rate 50Mpa: 125L/min Material: Medium Carbon/Stainless Steel/1 Cr18Ni9