Describes how an escalator works using a complex conveyor system and how it makes transportation more convenient.
Escalators (How It Works)
$19.16 - $23.95
- UPC:
- 9781627177696
- Maximum Purchase:
- 3 units
- Binding:
- Paperback
- Publication Date:
- 2014-08-01
- Author:
- Kelli Hicks
- Language:
- english
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