Confirmation that his devices actually do work come from his collection of granted us patents on various parts of the WFC system.
证实他的设备实际上做的工作，他收集来自授予美国专利关于世界粮食理事会系统各部分的。
Confirmation that his devices actually do work come from his collection of granted us patents on various parts of the WFC system.
证实他的设备实际上做的工作，他收集来自授予美国专利关于世界粮食理事会系统各部分的。
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