Ukusetshenziswa kwezinsimbi:
Isetshenziselwa ukukala amandla adingekayo ukudonsa i-tuft eyodwa noma iluphu kukhaphethi, okungukuthi amandla okubopha phakathi kwenqwaba yekhaphethi nokusekela.
Hlangana nezinga:
BS 529:1975 (1996), QB/T 1090-2019, ISO 4919 Indlela yokuhlola yokudonsa amandla enqwaba yokhaphethi.
Ifanele ukuhlolwa kobukhulu babo bonke okhaphethi abalukiweyo.
QB/T1089, ISO 3415, ISO 3416, njll.
Izici zomkhiqizo:
1, igeji yokudayela engenisiwe, ukunemba kungafinyelela ku-0.01mm.