Yam ntxwv: ib sab thiab ob sab
Cov khoom no yog siv nyob rau hauv hluav taws xob vuam tshuab, tsheb kho tshuab, shaping tshuab, qhov chaw vuam tshuab, cov hlau clip txuas nrog cov hlau ntawv, nrog rau cov hlau nplaum adsorbed ntawm cov hlau ntawv. Txuag sijhawm thiab tsis txhob ua mob rau cov ntawv hlau.
Khoom siv: NdFeB