Escalators (How It Works)

UPC:
9781627177696
Binding:
Paperback
Publication Date:
2014-08-01
Author:
Kelli Hicks
Language:
english
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Describes how an escalator works using a complex conveyor system and how it makes transportation more convenient.

Binding:
Paperback
Publication Date:
2014-08-01
Author:
Kelli Hicks
Language:
english

Reviews