Two-Way Transport on a Pumping Line
- Masses can be conveyed on trolleys in both directions on a tensed pumping line. To make progress, a line-grabbing cam-cleat can hold-and-release a pumping line by phase. Its a very similar principle to technical climbing ascenders driven in a mirrored frame-of-reference.
Such line-trolleys can do relay-transport across the sky with just one line.
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