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Daim Ntawv Thov Graphite Mould
Nyob rau xyoo tas los no, nrog rau kev loj hlob sai ntawm kev lag luam pwm thiab pwm, cov ntaub ntawv graphite, cov txheej txheem tshiab thiab cov chaw tsim pwm pwm thiab pwm ntau ntxiv tau cuam tshuam rau kev lag luam pwm thiab pwm. Graphite tau maj mam dhau los ua cov khoom siv nyiam rau kev tsim pwm thiab pwm nrog nws cov khoom zoo thiab tshuaj lom neeg.