Ntau npaum li cas yog Bumper Tsheb
Yog tias koj nyob ntawm lub laj kab txog kev pib ua lag luam tsheb bumper, tsis txhob yig tau ntxiv lawm. Vim hais tias nws yuav zoo npaum li cas los pib lub lag luam tsheb bumper yog dhau qhov kev xav. Tus nqi tsheb bumper yog qhov tseem ceeb ua ntej pib ua lag luam. Yog li ntau npaum li cas cov tsheb bumper? Bumper Tsheb Nqe Sib txawv raws li… nyeem ntxiv