3 ms·
> anticipated to be ten times faster than conventional boring machines Anticipated. And this is probably top speed in perfect London clay, not average speed in
by konschubert 8y ago
> anticipated to be ten times faster than conventional boring machines
Anticipated. And this is probably top speed in perfect London clay, not average speed in average conditions.
EDIT: Oh, and it's also by reducing the size of the tunnel by 4?