Zitseko ndi mazenera ndizofunikira kwambiri pa dongosolo la envelopu yomanga, yomwe imagwira ntchito yosindikiza, kuyatsa, kukana mphepo ndi madzi, komanso kutsutsa kuba. Zosindikizira zomwe zimagwiritsidwa ntchito pazitseko ndi mawindo makamaka zimaphatikizapo guluu wa butyl, guluu wa polysulfide, ndi guluu wa silikoni womwe umagwiritsidwa ntchito pagalasi, ndi zosindikizira zomwe zimagwiritsidwa ntchito ...
Werengani zambiri