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Explain the following cylinder head measurements.

1. Cylinder head warpage:

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2. Value guide wear:

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3. Valve seat width:

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4. Valve spring tension:

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5. Valve spring straightness:

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6. Valve stem diameter:

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7. Valve face:

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8. Valve Margin:

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9. Installed Height:

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10. Valve face to valve seat contact point:

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