他们的作业工具是：挖土用的手工泥铲、浇筑混凝土井壁用的胶合板模板、还有手工制作摇杆。摇杆将一个人送到井底，那个人就在井底一点点挖土然后再通过摇杆把沙子一桶桶送到地面。
They worked with hand trowels, a plywood form for lining the shaft with concrete, inch by inch, and a sturdy hand-built crank for lowering a man to the bottom and sending up buckets of sand.
含锰11- 14%的钢有极高的耐磨性，用于挖土机铲斗，球磨机衬板等。
Wear resistance high manganese steel 11-14%, for the excavator bucket, ball mill liner.
在地面凹凸不平地区也常用反铲挖土机挖沟。
A backhoe is often used in ditching where the soil conditions are usually rough.
当时，这个铜像从挖土机的铲斗中滚落了下来。
当时，这个铜像从挖土机的铲斗中滚落了下来。
应用推荐