Ball Bearing Trimming Bits Have Dead Pilots That Turn with the Bit

question 30

True/False

Ball bearing trimming bits have dead pilots that turn with the bit.

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Definitions:

Contact Metamorphism

A type of metamorphism that occurs when rocks are heated and chemically altered by close contact with hot magma or lava.

Shallow Levels

Areas near the Earth's surface or at a minimal depth below it.

Crust

The outermost layer of the Earth, consisting of solid rocks, and subdivided into the continental and oceanic crust.

Subduction Zone

A region of the Earth's crust where two tectonic plates converge, and one plate is forced below the other into the mantle.