home *** CD-ROM | disk | FTP | other *** search
/ Teach Your Children: Road Construction Ahead / Teach Your Children: Road Construction Ahead.iso / mac / MEDIA / VIDEO / 0716.MOV (.mp4) < prev    next >
Apple QuickTime movie  |  1996-06-03  |  11.1 MB  |  720x480  |  29.97fps  |  51 seconds  |  [MooV/TVOD]
Transcription: The word excavate means to dig. The excavator moves around on crawler tracks which keep it from getting stuck in the mud. It reaches its arm out and with its bucket it can tear up rocks, concrete and soil. The cab can turn around without moving the tracks. This helps to keep its balance when lifting a heavy load. The long arm of the excavator can be used to put other road building material in places that are difficult to reach. It's also useful in lifting and placing culvert pipes with the help of a long chain connected to the bucket. Special excavators, also called power shovels, are used to ...