Comment by ceejayoz
9 years ago
The ongoing maintenance of tens of thousands of sliding doors, elevators, and retracting fences sounds like a biggie to me.
9 years ago
The ongoing maintenance of tens of thousands of sliding doors, elevators, and retracting fences sounds like a biggie to me.
Every subway contains a whole bunch of sliding doors that open and close every single stop.
Yes, and they frequently need repair and maintenance.
Now imagine having tens of thousands of subway cars instead of a couple hundred.
There are tens of thousands of teslas out there already with automatic doors.
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