1. Introduction Hoisting pulleys are essential mechanical devices for lifting and moving heavy loads. Composed of grooved wheels and ropes/cables, they reduce lifting force, boost efficiency, and are widely used in construction,

The hydraulic engineering metallurgical cylinder body is a core executive component in heavy-duty metallurgical equipment and hydraulic systems, which undertakes the key tasks of converting hydraulic energy into mechanical energy, bearing high pressure, and trans

Fiberglass ducts, also known as glass fiber reinforced plastic (FRP) ducts, are non-metallic ventilation components widely used in HVAC systems and industrial ventilation. Composed of glass fiber as reinforcement and resin or inorganic cement as matrix, they offe