bell and hopper arrangement是什么意思

用法例句

Through using of tungsten carbide bell in the Jinan iron and steel group,it is discovered that the tungsten carbide bell has high hardness, high wear resistance; the service life of this bell compared with building up alloy bell is high more than 2 times; using of this bell can save of maintenance time and can increase the operation rate.

本文通过碳化钨料钟（斗）在济钢的应用效果分析表明，其硬度高，耐冲刷性好，使用寿命比堆焊合金料钟（斗）延长２倍以上，并可节省检修时间，提高作业率。