Lub hlau nplaum
Lub chaw nres nkoj magnetization yog 26 hli ntev, 16mm dav thiab 62mm sib sib zog nqus. Lub tshuab nqus hlau yog siv los siv hlau nplaum ntau cov hlau nplaum los rhuav tshem cov khoom siv hlau nplaum.
Sau koj cov lus ntawm no thiab xa rau peb