Cov thoob qaib, os thiab goose thoob tau muab faib ua ob hom: cais thoob thiab cov thoob sib txuas, txhua tus muaj plaub qauv.Cov khoom siv yog tsim los ntawm HDPE raw khoom, uas tsis yooj yim rau kev puas tsuaj los ntawm extrusion, thiab tiv taus trampling thiab compression thaum lub sij hawm pub mis.Fractional tsim thiab anti-pickling tsim kom tsis txhob pub khoom noj.Tag nrho lub cev muaj zog zoo, nws tsis yooj yim rau deformed los ntawm extrusion, thiab nws kuj siv tau rau deformation.Hauv qab yog txuas nrog lub buckle, thiab lub thoob txuas nrog lub chassis, uas yog nruj thiab tsis yooj yim rau loosen.