Symbol
$Di_{\mathrm{d}}$
Unit
mm
Used in
$A_{\mathrm{d}}$
$A_{\mathrm{d_{\mathrm{fill}}}}$
$CC_{\mathrm{p}}$
$CR_{\mathrm{p}}$
$\lambda_{\mathrm{3}}$
$T_{\mathrm{4ii}}$
$w_{\mathrm{p}}$