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G AND M CODES

These codes are used within the pro

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G CRAMP

One in the shape of a G, with a screw passing through one end. The shoe is sometimes swivelled to enable the cramp to be used on tapered surfaces. Also G clamp.

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G TOLERANCE

The tolerance of an object or person to a given value of g force.

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G-BANDING

A method of staining chromosomes. See panel on Chromosome

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G-DISPLAY

Similar to F-display but indicating increas

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G-GAS

Gaseous mixture based on helium and isobutane used in low-energy beta counting eg of tritium by gas-flow proportional counter. See gas-flow counter.

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G-P ZONES

Abbrev for Guinier-Preston zones.

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G-STRING

Colloquiallism for single-wire transmission line loaded with dielectric so that surface-wave propa

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G-VALUE

A constant in radiation chemistry denoting the number of molecules reacting as a result of the absorption of 100 eV radiation energy.

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G-Y SIGNAL

Component of colour TV signal which, when combined with the Y signal produces the green chrominance signal.

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