Durable cost-effectiveness of second-hand excavators. The working altitude is up to 3300 m (10,830 7.lt can operate at temperatures up to 52 *C (125 · F)...Durable cost-effectiveness of second-hand excavators. The working altitude is up to 3300 m (10,830 7.lt can operate at temperatures up to 52 *C (125 · F)...Durable cost-effectiveness of second-hand excavators. The working altitude is up to 3300 m (10,830 7.lt can operate at temperatures up to 52 *C (125 · F)...