目前，世界各先进工业国商品混凝土的普及率已达到８０％左右。混凝土泵和混凝土泵车正向高压、大容量发展，使用机、电、液一体化的控制系统，提高了设备的可靠性和延长了使用寿命。我国的混凝土机械同国外相比有着不小的差距，主要表现在产品规格少，可靠性差，使用寿命... At present, the penetration rate of commercial concrete in the world’s advanced industrial countries has reached about 80%. Concrete pumps and concrete pump trucks are developing with high pressure and large capacity. The use of integrated control systems for machines, electricity, and liquids has increased the reliability of the equipment and prolonged its service life. China’s concrete machinery has a considerable gap with foreign countries, mainly in the product specifications, poor reliability, service life...