I.Khoom Taw Qhia:
Cov khoom muaj cov qauv ua piv txwv thiab kaum sib txawv tshwj xeeb ntawm lub phaj nruab nrab, tag nrho ntawm 10 qhov chaw tshwj xeeb, muaj peev xwm hloov mus rau cov qauv tuab tuab. Dav siv nyob rau hauv papermaking, ntim thiab khoom lag luam zoo thiab kev soj ntsuam kev lag luam thiab chav haujlwm. Nws yog cov khoom siv tshwj xeeb rau kev sim lub nplhaib compression lub zog ntawm daim ntawv thiab duab los qhia.
U No.1 0.100-0.140 hli
U No.2 0.141-0.170 hli
U No.3 0.171-0.200 hli
U No.4 0.201-0.230 hli
U No.5 0.231-0.280 hli
U No.6 0.281-0.320 hli
U No.7 0.321-0.370 hli
U No.8 0.371-0.420 hli
U No.9 0.421-0.500 hli
U No.10 0.501-0.580 hli