点评：Unique piece of invention and history. Designed to find a way to harvest gold bearing ore from the bed of a deep river, this has been recovered and restored. Worth a quick stop to see what people would do to recover gold.
翻译：独一无二的发明和历史。它旨在找到一种从深河床中开采含金矿石的方法，现已被回收和修复。值得短暂停留，看看人们会如何回收黄金。
