parallel bars, measuring jaw
retaining device are hardened, accurately ground steel bars of various thicknesses, widths, and lengths, which are used to raise the work piece and seat it square and parallrl with the base of a wise as, mõõterakis, mis koosneb paralleelsetest karastatud terasvarrastest, mis on kalibreeritud erineva läbimõõdu ja pikkuse järgi ning mida kasutatakse osise täpseks paigaldamiseks
