hubbed flange英美网络 高颈法兰化学双语例句Numerical Simulation of Die Forging for Corrosion Resistant Hubbed Flange耐腐蚀高颈法兰胎模锻造成形的数值模拟Finite element stress analysis of hubbed welding flange in different mechanical models不同力学模型下锥颈对焊法兰的有限元应力分析