由山东成山橡胶集团承担的国家“九五”重点科技攻关项目—采用全部国产技术和主要生产设备开发的低滚动阻力、高性能系列子午胎 ,日前通过了国家验收。成山集团开发的低断面全钢载重、半钢轻载 ,55″和 50″系列轿车子午线轮胎 ,经国家橡胶轮胎监测中心检测 ,均达到或超过国家 The national “Ninth Five-Year Plan” key scientific and technological research project undertaken by Shandong Chengshan Rubber Group—a low rolling resistance, high-performance series of radial tires developed using all domestic technologies and major production equipment, has recently passed national acceptance. The low-profile all-steel load and semi-steel light load developed by the Chengshan Group, 55′′ and 50′′ radial passenger car tires, have passed the national rubber tire monitoring center and have reached or exceeded the national level.