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Drilling rigs come in many sizes and do many jobs. Some machines drill thousands of feet under the ground. The biggest rigs reach distances of up to 8 miles below the surface. Readers will also learn about oil platformsthe drilling rigs of the sea. The remarkable photographs and diagrams inside this book show drilling rigs up close and demonstrate how they work.
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This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
