Rail gaskets yog cov khoom tseem ceeb ntawm txoj kev tsheb ciav hlau. Cov khoom tseem ceeb yog manganese alloy. Nws txoj haujlwm yog coj lub log ntawm cov khoom dov rau pem hauv ntej, tiv taus lub siab loj ntawm lub log, thiab xa mus rau cov neeg pw tsaug zog. Nws cov khoom tseem ceeb yog carbon steel, uas muaj zog thiab hardness, siab elasticity txwv thiab qaug zog txwv.