material measure with star-shape grooves, star-shape grooves measurement standard, star-shape grooves standard
material measure/measurement standard that of a number of grooves with triangular cross-section in the X-Y plane with respect to the azimuthal orientation, pinnamõõt/pinnaetalon, mis hõlmab mitmeid kolmnurkse ristlõikega sooni X-Y tasapinnas asimuudi orientatsiooni suhtes