shaft lining bottom的意思|示意
井壁底部
shaft lining bottom的网络常见释义
井壁底 文章摘要信息 关键词 ： 特厚表土层；钻井法凿井；井壁底；有限元法 [gap=1385]Keywords : superdeep alluvium；shaft drilling；shaft lining bottom；finite element method
shaft lining bottom相关例句
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。