Strong winds aloft are responsible for the curious curvature of the rain shafts .
高处的强风是造成这种古怪曲率雨轴的原因。
Codelco mobilised contractors and equipment from around the world to drill three separate rescue shafts .
codelco调动了承包商和全球的设备来挖掘3条独立的竖井。
A safety drive has cut deaths by almost a fifth since 2005 , on average more than 10 people died each day last year in mining incidents such as flooded shafts and collapses .
