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.
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.
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。
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