Polyurethane sealing nplhaib yog tus cwj pwm los ntawm kev hnav tsis kam, roj, acid thiab alkali, ozone, kev laus, tsis tshua muaj kub, tearing, cuam tshuam, thiab lwm yam. Polyurethane sealing nplhaib muaj peev xwm txhawb nqa loj thiab siv dav hauv ntau yam. Tsis tas li ntawd, cam khwb cia sealing nplhaib yog roj resistant, hydrolysi ...
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