LIBROS DEL AUTOR: p wijdenes

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  • Five Place Tables
    P. Wijdenes
    Instead of the old division of the right angle in 90° of 60’ at 60' each, the following division finds ever more frequent application: one quadrant has 100 grades (gr), which in their turn are sub­ divided decimally in decigrades (dgr), centigrades (cgr), milligrades (mgr) and decimilligrades (dmgr). In using instruments upon which the quadrant is div...
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    66,80 €