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REFERENCES

https://www.slideshare.net/naiemhashim/lukisan-teknik-14603401

https://theconstructor.org/construction/instruments-engineering-drawing/20067/
https://mak.trade/info/articles/2019/kakie_byvayut_formaty_i_razmer_listov_bumagi_/

https://anyflip.com/wdnrx/ohuq/basic
https://www.scribd.com/document/242232811/Piping-Coordination-Systems-Mechanical-
symbols-for-Isometric-drawings-pdf

https://www.math-only-math.com/construction-of-angles-by-using-compass.html
https://www.onlinemath4all.com/construction-of-angles-using-ruler-and-compass.html

http://tgbasics.weebly.com/construct-a-square-given-one-side.html