An escalator is a moving staircase with steps that go up or down. This book discusses how an escalator if based off a conveyor system, moving objects up and down using gears and chains that are connected to the steps, flattening them out at the top and bottom so people can easily get on.
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An escalator is a moving staircase with steps that go up or down. This book discusses how an escalator if based off a conveyor system, moving objects up and down using gears and chains that are connected to the steps, flattening them out at the top and bottom so people can easily get on.
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Add this copy of Escalators (How It Works) to cart. $21.38, good condition, Sold by Jenson Books Inc rated 4.0 out of 5 stars, ships from Logan, UT, UNITED STATES, published 2014 by Rourke Educational Media.
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Seller's Description:
Ex-library book. The item shows wear from consistent use, but it remains in good condition and works perfectly. All pages and cover are intact (including the dust cover, if applicable). Spine may show signs of wear. Pages may include limited notes and highlighting.
Add this copy of Escalators (How It Works) to cart. $55.03, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2014 by Rourke Educational Media.
Add this copy of Escalators (How It Works) to cart. $666.67, very good condition, Sold by BookDrop rated 4.0 out of 5 stars, ships from Phoenix, AZ, UNITED STATES, published 2014 by Rourke Educational Media.
