Give four ANSI rules applying to drawings using millimeters as the standard unit.
What will be an ideal response?
For metric drawings where millimeters are the standard unit, the following rules apply:
1. Where the dimension is less than one millimeter, a zero precedes the decimal point.
2. Where the dimension is a whole number, neither the decimal point nor the zero is shown.
3. Where the dimension exceeds a whole number by a decimal fraction of one millimeter, the last digit to the right of the decimal point is not followed by a zero.
4. Neither commas nor spaces shall be used to separate digits into groups in specifying millimeter dimensions on drawings (e.g., 1000 not 1,000).
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