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Tolerance of key length

Values for calculation

$ l $ $ \mathrm{mm} $

Calculation

Tolerance of key length

$\text{if }\ l\le 28$
$$l_t=0.2$$
$\text{else if }\ l\le 80$
$$l_t=0.3$$
$\text{else}$
$$l_t=0.5$$
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