Thickness of screen, sheath or armour

Symbol
$\delta _{k}$
Unit
mm
Formulae
$t_{sc}$screen
$t_{sh}$sheath
$d_{f_{1}}$first armour layer
$d_{f_{2}}$second armour layer
Related
$d_{f_{1}}$
$d_{f_{2}}$
Used in
$M_{k}$