Curbstone Pwm ceev faj

Curbstone pwm ib txwm ntsib qee yam teeb meem thaum siv. Curbstone pwm siv cov yas pwm raws li cov khoom siv raw. Yas pwm yog yooj yim oxidized rau saum huab cua. Tom qab oxidation, cov pwm yas ua kom tawg, uas yuav ua rau muaj cov kev sib tsoo ntawm cov yas thiab ua rau tsis tsim nyog. Nyob rau tib lub sijhawm, Curbstone pwm tuaj yeem rov ua tau ntau tshaj li ib puas npaug thiab yuav deorm. Yog li ntawd, tso cov pwm ib sab ntawm ib leeg thaum siv los tiv thaiv deformation. Cov pwm yas tuaj yeem rov qab siv dua tom qab siv los txo cov nqi thiab pov tseg ntawm cov peev txheej.