'Used as early as 230 B.C., the 1st successful electric one was developed by the Otis Bros. in 1889'
an elevator
ENGINEERING: Used as early as 230 B.C., the 1st successful electric one was developed by the Otis Bros. in 1889
Used as early as 230 B.C., the 1st successful electric one was developed by the Otis Bros. in 1889
Used as early as 230 B.C., the 1st successful electric one was developed by the Otis Bros. in 1889
ENGINEERING
an elevator
ENGINEERING