It’s contradictory: was the screw compressor developed first as a twin-screw type or as a single-screw type? And which one is more advanced? ?
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I remember reading that it was invented by someone who worked on twin-screw technology. The single-screw design was invented later; yet today I’ve seen claims that the single-screw design is older while the double-screw design was invented later. I’m completely confused.
What remains are the best products that were not eliminated. As for who the ancestors are, that is something for scholars to determine; if you want to write a book on their history, you can collect information about it over time.
Which came first, the chicken or the egg? The sequence of such events has little impact on the staff, so there’s no need to get distracted by them!