Pages

សង្រ្គាម ជំលោះតាម បណ្តាទ្វីប

ប្រធានបទ វិស្វកម្ម យោធា

Monday, October 13, 2014

RADAR

RADAR: The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging.

No comments:

Post a Comment