Waxaa loo isticmaalaa in lagu tijaabiyo hantida dab-damiska ee walxaha guban kara sida dharka, dharka dhallaanka iyo carruurta, xawaaraha gubashada iyo xoojinta ka dib shidista.
Waxaa loo isticmaalaa go'aaminta sifooyinka gubashada toosan ee dharka kala duwan ee dharka, barkinta baabuurta iyo agabyada kale, oo lagu muujiyey heerka faafitaanka ololka.
Heerka Kulanka:
GB/T5453,GB/T13764,ISO9237,EN ISO 7231,AFNOR G07,ASTM D737,BS5636,DIN 53887,EDANA 140.1,JIS L1096,TAPPIT251.