Abstract: Due to high temperature, high pressure, strong corrosion and other adverse conditions, metal valves can easily cause seal failure and leak in coal chemical, petrochemical and other ...

Abstract: The STM32 series single-chip microcomputer is used as the controller to control the stepping motor through the L9110S motor drive module, thereby affecting the gap of the cone valve. At the ...

Step‑by‑step installation of a new seal kit on a hydraulic cylinder gland. Is Trump already a lame duck — or more dangerous to Canada than ever? Canada shooting suspect identified as 18-year-old with ...