I.Selelekela sa Sehlahisoa:
Sehlahisoa se na le mohlala oa motheo le litlhaloso tse leshome tse fapaneng tsa boholo ba poleiti e bohareng, e loketseng (0.1 ~ 0.58) mm botenya ba sampuli, kakaretso ea litlhaloso tsa 10, tse nang le lipoleiti tse fapaneng tsa setsi, li ka ikamahanya le botenya bo fapaneng ba sampole. E sebelisoa haholo indastering ea ho etsa pampiri, ho paka le ho hlokomela boleng ba lihlahisoa le liindasteri le mafapha. Ke sesebelisoa se ikhethileng bakeng sa ho lekola matla a khatello ea lesale la pampiri le khateboto.
u No.1 0.100-0.140 limilimithara
u No.2 0.141-0.170 limilimithara
u No.3 0.171-0.200 limilimithara
u No.4 0.201-0.230 limilimithara
u No.5 0.231-0.280 limilimithara
u No.6 0.281-0.320 limilimithara
u No.7 0.321-0.370 limilimithara
u No.8 0.371-0.420 limilimithara
u No.9 0.421-0.500 limilimithara
u No.10 0.501-0.580 limilimithara