Ballpoint pen (English: ballpoint pen) is the pen with the tip is made from metal ball small diameter is about 1 mm. Ball rotate around the And edge socket to prevent a ballpoint ink will flow through the pipe off this narrow the ball rotate on the surface of the paper. Ridge in Bao metal will pay to sustain a ballpoint ink and ink lines. Most ballpoint pen to write the story 2.5-3.5 kilometers a year. In 1930 Laszlo Rosa, painter and journalist, Hungarian. Invented the artificial ballpoint pen. After World War II. Rosa in an asylum in Argentina. The company was founded a pen that he and his brother together up. And sell an invention in A.D. 1944 then popular. Due to the ease of portability and is the water ink does not fade.
การแปล กรุณารอสักครู่..