sterilization hnab

Self-sealing sterilization hnab tau nrov zuj zus los siv rau hauv cov chaw kho mob, chaw kho mob, thiab chaw kuaj mob kom khaws thiab thauj ntau yam c

Lub hnab kom tsis muaj menyuam yog ib qho khoom siv tseem ceeb hauv txhua lub tsev kho mob lossis chaw kho mob. Nws yog tsim los xyuas kom meej tias t