Umucu wokuvala umnyango usetshenziselwa kakhulu ukulungisa isicabha semoto, ukuvikela uthuli nokubeka uphawu ikakhulukazi unokuqina okuhle nokuqina kokuqina kokuqina, ukumelana nokuguga, i-ozone, irabha ye-EPDM enohlu olubanzi lwesenzo samakhemikhali (-40_+120 ℃) ( EPDM) igwebu lerabha kanye nenhlanganisela eminyene
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