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  2. Centre-to-centre distance - Wikipedia

    en.wikipedia.org/wiki/Centre-to-centre_distance

    Centre-to-centre distance (c.t.c. distance or ctc distance) is a concept for distances, also called on-center spacing (o.c. spacing or oc spacing), heart distance, and pitch. It is the distance between the centre (the heart) of a column and the centre (the heart) of another column. By expressing a distance in c.t.c., one can measure distances ...

  3. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    No longer a commonly used abbreviation. Better to spell out for clarity. CL or ℄ centreline or centerline; class: 1. Center line, the central axis of a feature. 2. Class, for example, "paint per spec XYZ revision C type 1 class 2" may be abbreviated as "paint per spec XYZ REV C TY 1 CL 2" or even in some cases "paint per spec XYZ-C-1-2".

  4. OC - Wikipedia

    en.wikipedia.org/wiki/OC

    On-center, in construction, indicating that the distance quoted is between the centers of neighboring wall studs, joists, or other members; Original content, original character, or original contribution, used to assert one's authorship of a given subject matter; Outrigger canoe

  5. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    Certain abbreviations are current within the profession of optometry. They are used to denote clinical conditions, examination techniques and findings, and various forms of treatment. They are used to denote clinical conditions, examination techniques and findings, and various forms of treatment.

  6. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    Abbreviation Term Notes M medium Wake turbulence category: MAC mean aerodynamic chord: MAC mid-air collision: MAHF Missed Approach Holding Fix Used in RNAV MANAB Manual of Word Abbreviations [15] Used in Canada MAP manifold absolute pressure: MAP missed approach point Or: MAPt. Instrument approach. MAPS Minimum Aviation Performance Standards MATS

  7. List of U.S. Navy acronyms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._Navy_acronyms

    The United States Navy, like any organization, produces its own acronyms and abbreviations, which often come to have meaning beyond their bare expansions.United States Navy personnel sometimes colloquially refer to these as NAVSpeak.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. CTR - Wikipedia

    en.wikipedia.org/wiki/CTR

    Center (disambiguation) (Center or Centre) for which CTR is an abbreviation of several values Control (disambiguation) for which CTR is an abbreviation of several values All pages with titles beginning with CTR