invar :

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  • n  an alloy of iron and nickel having a low coefficient of thermal expansion; used in tuning forks and measuring tapes and other instruments
News & Articles

  • Indian T-90s Get 5,000 Meter Reach
    September 4, 2013: India recently revealed that it had negotiated a manufacturing license to build 15,000 Russian Invar anti-tank missiles in India where they are used by T-90 tanks.
    Sept. 4, 2013 - Strategy Page

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