I.Intshayelelo Intshayelelo:
Imveliso iqulathe isampulu yesiseko kunye neendlela ezilishumi ezahlukeneyo zeplate, ilungele (0.1 ~ 0.58) Ubungakanani besampulu, iyonke, i-10 yeepleyiti ezahlukeneyo, zinokuziqhelanisa nobungqiwa besampulu. Isetyenziswe ngokubanzi kwipapermandung, ukupakisha kunye nokubekwa kweliso kwimveliso kunye nemveliso yokuhlola amashishini kunye namasebe. Sisixhobo esikhethekileyo sokuvavanya amandla oxinzelelo lweringi kunye nekhadibhodi.
U-No.1 0.100-0.140 mm
no..2 0.141-0.170 mm
I.3 0.171-0.200 mm
I-U.4 0.201-0.230 mm
I-U.5 0.231-0.280 mm
I-U.6 0.281--0.3 mm
No.7 0.31--0.370 mm
I-U.8 0.3-0.420 mm
I.9 0.421-0.500 mm
U-no.10 0.501-0.580 mm