Manually handling pad-mount transformers took its toll on line crews from Canadian utilities Hydro One and Hydro Ottawa Ltd. Each time the equipment had to be installed or removed, line workers had to ...
Cranes first appeared in ancient Greece over 2,500 years ago, but new research suggests a primitive lifting machine—a kind of forerunner to the crane—was in use around 150 years earlier. The ancient ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback