论文部分内容阅读
对于承受液压的铸件要求具有良好的耐压致密性,即要求材质综合具有高的强度,而且铸件的致密性好和较为耐磨.我国高压液压阀
For the hydraulic castings require a good pressure tightness, which requires a comprehensive material with high strength, and the castings of good compactness and wear-resistant. China’s high-pressure hydraulic valve