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Daim Ntawv Thov Ntawm Graphite Mould
Xyoo tsis ntev los no, nrog kev txhim kho sai ntawm kev tuag thiab pwm kev lag luam, cov khoom siv graphite, cov txheej txheem tshiab thiab nce kev tuag thiab pwm chaw tsim khoom tau cuam tshuam tas li rau kev tuag thiab pwm kev lag luam. Graphite tau maj mam dhau los ua cov khoom nyiam rau tuag thiab pwm ntau lawm nrog nws lub cev thiab tshuaj zoo.
