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| | AAR Mechanical Designations |
 | | This list does include all major types, but since a number of revisions remain to be referenced some minor types and changes may not be present. |
 | | Revisions made to AAR types: Adopted 1910, revised 3/27, revised 3/28, revised 3/29, revised 3/30, revised /36, revised /38, revised /40, revised /41, revised /42, revised /45, revised /48, revised /52, revised /56, revised /57, revised /61, revised /65, revised /68, revised /79. |
 | | in floor and roof based on the insulation requirements given in AAR Standard S-2010 or a thickness reduced in proportion to the thermal conductivity of the material. |
| www.nakina.net /aartype.html (9510 words) |
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