In the USA, the University of Pennsylvania’s cyclotron, for example, built in 2009, weighs in at slightly over 200 metric tonnes and shoots protons through a 91 m pipe bristling with gadgets into treatment rooms where 90 tonne motorized cranes are used to achieve the optimal targeting of tumours.
我 不大 喜? 欢 你...但 你 真是?? 胆 色WHO WHO