经过 2个多月的实际运行表明 ,首钢大石河铁矿 12号别拉斯 752 3矿车 ,改装 5+ 2变速箱取得了理想效果 ,矿车完好率提高了 3%以上 ,彻底改变了原装 3+ 1变速箱扭力不足 ,故障频繁的局面。首钢矿业公司在册别拉斯 752 3矿车 153台 ,全部改装 5+ 2变速箱后 ,不仅可以提高 4 2ｔ矿 After more than two months of actual operation shows that Shougang Dashihe Iron Mine No.12 Las Sal 752 3 car, modified 5 + 2 gearbox achieved the desired effect, the car intact rate increased by 3%, completely changed the original 3+ 1 gearbox torque shortage, frequent failure situation. Shougang Mining Company in Volas 752 3 153 cars, all converted 5 + 2 gearbox, not only can improve 4 2t mine