I’m browsing some manuals for terms to put in the ontology. In one printer manual there read:

For optimum performance, use the printer at elevations below 2,500 m (8,200 ft.). Performance may diminish at elevations between 2,500 m (8,200 ft.) and 3,000 m (9,840 ft.). Use at elevations above 3,000 m (9,840 ft.) exceeds operability limits.

Shoot, I can’t take the 82 kg printer with me on a mountain hike.