挖掘链 meaning in English

digger chain

Those mentioned above has already been proved either in and outside our country . infact , when the machine works on the track which is mudding and hardening , especially on hardening line , rm - 80 can not give full play to it ' s productivity , and sometime the machine can not go forward with excavating chain turnning , which results in a low productivity of not more than 100 meters per hour
在我们的生产实际中，尤其在板结地段， rm80型全断面道碴清筛机的作业效率就不能得以充分的发挥，经常出现挖掘链转不动、清筛机不前进，或者是作业效率很低，以致于每小时作业速度不足百米的情况。