keerukas lõikuvaist või põimuvaist joontest moodustatud võrk rahamärkidel, väärtpaberitel jm võltsimise vältimiseks
an ornament in the form of two or more bands or strings twisting over each other, so as to repeat the same figure, in a continued series, by the spiral returning of the bands
Provisions concerning the preparation and issue of certificates of origin. ... The format of certificate shal be 21*30 cm. ... It shall have printed on it a sepia-coloured guilloche pattern that will reveal any forgery by mechanical or chemical means.
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