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Mechanical Pencils

Published on Nov 23, 2015

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PRESENTATION OUTLINE

1.

MECHANICAL PENCILS

2.

WHO INVENTED IT?

SLAVIJUB EDUARD PENKALA
3.

SLAVIJUB EDUARD PENKALA

BORN:APRIL 20,1871 DEAD:FEBRUARY 5,1922
4.

WHAT IS THE USE?

TO NOT SHARPEN THE REGULAR PENCIL EVERY TIME IT BREAKS
5.

HOW THEY WORK

PUSH A BUTTON OR SHAKE THE PENCIL AND LEAD COMES OUT

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