单词	abac scale
释义	ABAC scale ABAC scale A nomogram for obtaining the conversion angle to apply when plotting great circle bearings on a mercator projection. ABAC scale ABAC scale A nomogram for determining the conversion angle to apply when plotting great-circle bearings on a Mercator projection. ABAC scales are printed on the margins of Mercator plotting charts. Scales A and C are interrelated, as are B and D. In the illustration, the ABAC scale measures the conversion angle for two places that have a 16° change of longitude between them and a mean latitude of 50°. The conversion angle in this case is 6°.
随便看	joint staff target operations division joint standard joint standard air operations joint standard air operations software joint standardization group for tactical command, control & communications system joint standard personnel administration and management system joint standards joint standards document joint standing committee joint standing committee of the primates joint standing committee on commerce, industry and banking joint standing committee on defence joint standing committee on delegated legislation joint standing committee on electoral matters joint standing committee on foreign affairs, defence and trade joint standing committee on intelligence joint standing committee on public accounts joint standing committee on public works joint standing committee on treaties joint standing committee report joint stand off munition joint standoff surface attack missile joint standoff weapon joint stars jointstars

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