Anatomy and histology of auxiliary sex glands in alpacas;
羊驼副性腺结构的组织化学研究
In order to decrease the wear of piston rings and cylinder liners,and improve partner adaptability,the laser cladding and electroplating techniques were adopted to prepare in-situ precipitation particle reinforced metal matrix composite coatings and chromium-plated coatings on the nodular cast iron matrix.
为降低活塞环、缸套摩擦副的磨损和改善配副性,采用激光熔覆和电镀技术在球墨铸铁表面分别制备原位析出颗粒增强金属基复合材料表层和镀铬层。