Underwater Robots
Thomas Kingsley Troupe
Buy new from $16.73
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Animal Robots
Thomas Kingsley Troupe
Buy new from $15.64
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A Manual of Machinery and...
William John Macquorn Rankine
Buy new from $55.84
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Simple Machines: Forces in...
Buffy Silverman
Buy new from $11.23
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Helper Robots
Nancy Furstinger
Buy new from $13.78
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Pulleys
Sian Smith
Buy new from $5.28
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Mechanical Engineering and...
Robert Snedden
Buy new from $8.44
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From Tree to Paper
Pam Marshall
Buy new from $13.21
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The Chunnel
Stuart A Kallen
Buy new from $61.51
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Pulleys
Sian Smith
Buy new from $8.68
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Levers
Sian Smith
Buy new from $10.19
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Blueprint Reading for the...
Russ Schultz,
Larry Smith
Buy new from $257.44
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Blast Off to Space Camp
Hillary Wolfe
Buy new from $11.04
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Lance Dragon Defends His...
Eric Braun,
Dr. Paul Ohmann (Consultant editor)
Buy new from $13.79
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Put Levers to the Test
Roseann Feldmann,
Sally M Walker
Buy new from $6.77
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Put Wheels and Axles to the...
Roseann Feldmann,
Sally M Walker
Buy new from $6.91
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Put Wedges to the Test
Roseann Feldmann,
Sally M Walker
Buy new from $6.77
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Put Inclined Planes to the...
Roseann Feldmann,
Sally M Walker
Buy new from $6.77
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Put Screws to the Test
Roseann Feldmann,
Sally M Walker
Buy new from $6.67
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The World's Smartest Machines
Linda Tagliaferro
Buy new from $5.41
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Put Pulleys to the Test
Roseann Feldmann,
Sally M Walker
Buy new from $6.77
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What Do You Know about Simple...
Tilda Monroe
Buy new from $14.17
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An Elementary Treatise on...
Joseph Gregory Horner
Buy new from $93.15
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The Romance of Modern...
Archibald Williams
Buy new from $18.65
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