Such guidelines would cover the question of how to conduct a proper assessment of functionality and the certification and labelling of used mobile phones, and so help ensure that there is no significant dumping of non-reusable parts.
这样的准则将涵盖如何对功能性进行适当评估的问题以及废旧移动电话的证明和标记问题，这样有助于确保不大量倾倒不可再用的部件。