Cov khoom

90 degree luj tshib

Lus piav qhia luv luv:

Lub luj tshib 90 degree yog ib hom luj tshib nrog lub kaum sab xis ntawm 90 degrees, feem ntau yog siv los hloov cov kev taw qhia ntws ntawm lub raj xa dej. Nws feem ntau yog siv rau hauv cov kav dej uas yuav tsum tau ua kom nruj dua cov ces kaum, xws li thaum lwm yam khoom siv hauv cov kav dej yuav tsum tau txuas ua ntej lossis tom qab khoov.


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Khoom cim npe


  • Yav dhau los:
  • Tom ntej:

  • Yam khoom