Sib tham txog cov khoom thiab kev phom sij cuam tshuam nrog pentane, ib tug volatile organic compound siv nyob rau hauv ntau yam kev siv.
Sib tham txog cov khoom thiab kev phom sij cuam tshuam nrog pentane, ib tug volatile organic compound siv nyob rau hauv ntau yam kev siv.