Professor Burland says it is possible to get within two metres of the foundations, to use the highly controlled operation of the flight auger, even up to withdrawing debris a cubic centimetre at a time if necessary.

• 伯尔兰德教授说，使用高度受控的飞行螺钻可能到达离基础两米以内的地方，在必要时甚至一次可以挖出一立方厘米的泥屑。