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Biro yana nufin alkalamin rubutu na zamani Bellis, Mary (15 April 2017). "How Laszlo Biro Changed the History of Ballpoint Pens". Thoughtco.com. Archived from the original on 18 April 2019. Retrieved 22 December 2017.Wanda yake ɗauke da ruwan tawadanshi nazamani wato (ink) aturance. Karn, Sajan Kumar (2012). "On Nepalese English Discourse Granting Citizenship to English in Nepal via Corpus Building". Journal of NELTA. 16 (1–2): 30–41. doi:10.3126/nelta.v16i1-2.6127. ISSN 2091-0487. Archived from the original on 2 August 2021. Retrieved 2 August 2021.itadai biro kalma ce ta turanci wacce aka hausantar da ita zuwa yaren hausa ta hanyar chanja Mata Karin sauti Wanda Bíró, da wannan tsarin rubutun. How does a ballpoint pen work?". Engineering. HowStuffWorks. 1998–2007. Archived from the original on 25 December 2018. Retrieved 16 November 2007.Kuma sunan yasamo asali ne daga wanda ya kirkiri biron wato  László Bíró, tun alif 1947, akasar hungariyaPerry, Romanowsky (January 1998). "How products are made". Ballpoint pen. Archived from the original on 20 July 2016. Retrieved 30 March 2017.. Akwai wani kirari da masu zaurance kema biro watau jan biro abun rubutun sharri. Russell-Ausley, Melissa (April 2000). "How Ballpoint Pens Work". Howstuffworks, Inc. Archived from the original on 4 May 2017. Retrieved 30 March 2017.Yana zuwa a nau'ika na kala daban-daban.

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