【Haichuan Equipment Guessing Game】Pulled up in circles, it reminds one of an ancient person
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Do you know what device it is?
Screw conveyor? Why do I think of the ancients?
【Chemicals in HaiChuan’s Life】Archimedes’ spiral https://bbs.hcbbs.com/thread-2731415-1-1.html (Source: HaiChuan Chemicals Forum)
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