Ninety per cent of lone parent families are headed by mothers.90%的单亲家庭由母亲持家。Ninety-nine per cent of primary pupils now have hands-on experience of computers.现在，99%的小学生都亲手操作过电脑。Secret investigations have netted ninety sta...
本公司是一家专业从事自主研发高性能荧光灯电子镇流器的生产厂家.Our company specializes in producing electronic ballasts of efficiency fluorescent illumination products.为了保证机壳内部空气流通,提高散热效率, 请垂直放置镇流器.To ensure ventilation and raise cooling efficiency, pl...
本文研究了无造渣剂等矿石粉的耐磨堆焊电焊条.An overlay welding electrode without mineral powder as, slag forming medium, etc.介绍了用高碳铬铁渣做造渣剂冶炼锰硅合金的生产实践.The practice of smelting ferromanganese silicon with slag of high carbon ferrochrome is intr...