teimiku kuju iseloomustav tegur (k) katsekeha/teimiku algpikkuse valemis Lo= k x So-2 (vt proportsionaalne tõmbekatsekeha, mitteproportsionaalne tõmbekatsekeha), coefficient of proportonality k in formula of original gauge length, expressed by the formula Lo=kxVSo (see: proportional tensile test piece, non-proportional tensile test piece