| 摘要 |
A slide rule has a rule face provided with a number of scales, a reglet whose face is provided with compartment scales for normal slide rule operation, and a cursor or slide is shiftable over the body of the rule and carries an index line for cooperation with the scales of the face. Along one longitudinal side of the body of the rule, a beveled face or trapezoidal flange carries a decimally divided scale which indicates units of length and simultaneously serves, by co-operation with the cursor, to indicate the mantissa of the logarithm of a number indicated on a logarithmically divided scale of the face of the slide rule.
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