The document discusses cylinder blocks used in press machines. Cylinder blocks must withstand high pressures and stresses without defects. They are made of materials like ZG45 by selecting molds and simulating the casting process. The blocks have been widely used in metallurgy, chemical, and construction industries in China and exported to other countries. They provide stable performance, simple technology, and low air viscosity. The manufacturer offers cost-effective production, fast delivery, and customer support.