Hauv Kev Tshawb Fawb Ntawm Ppr Nres Valve

Vim muaj kev sib txhuam qis ntawm qhov chaw sib khi thaum lub sijhawm qhib thiab kaw, lub ppr nres valve yog qhov ruaj khov, muaj qhov qhib me me qhov siab, yooj yim los tsim, thiab yooj yim rau kev txij nkawm. Nws tsis tsuas yog haum rau nruab nrab thiab tsis tshua muaj siab, tab sis kuj rau kev kub siab.