Mechanical lead cwj mem siv tus qauv 2 txhuas, uas yog tsim los ntawm graphite, yog li nws muaj peev xwm siv tau rau cov qauv kev xeem thiab lwm yam kev siv uas yuav tsum tau muaj cov hlau lead no. Nrov hom muaj xws li BIC mechanical mem hluav thiab Pentel mechanical pencils.
Muaj cov cwj mem puas yog 2?
2 xaum thiab xaum tshuab tsis yog ib txwm tswj tsis tau. 2. Tsis tas li ntawd, lawv nyias nyias thiab nyias nyias, uas txhais tau hais tias koj cov qhab nia yuav tsis yooj yim nyeem raws li cov tuab tuab, cov cim tsaus nti koj tuaj yeem ua tiav nrog cov laus-tsev kawm ntawv 2 cwj mem.
Mechanical xaum loj npaum li cas yog tus lej 2?
2 yog hais txog qhov nyuaj ntawm cov hlau lead, yog li nws nyob ntawm cov hlau lead uas koj siv hauv cov cwj mem - yog tias koj yuav HB leads - txawm tias 0.5 hli lossis 0.07 hli lossis 0.09 hli- uas yog sib npaug rau 2; muaj lwm yam npe xws li B lossis H uas txawv.
Yuav suav li cas 2 tus cwj mem?
Feem ntau, qib HB txog nruab nrab ntawm qhov ntsuas suav tias yog qhov sib npaug rau 2 cwj mem uas siv US tus lej lej.
Puas yog Paper Mate mechanical pencils 2?
Lub Clearpoint Mechanical Pencil los nrog ntau yam 2 coj, ua kom nws zoo meej rau kev xeem, sau ntawv, thiab lwm yam haujlwm sau ntawv. (Cov hmoov txhuas thiab cov nplaum nplaum rov qab muag nyias.)
