I. Rudzi rwezvigadzirwa zvekuyedza rabha: 1) Rabha: rabha yechisikigo, rabha resilicone, rabha restyrene butadiene, rabha re nitrile, rabha re ethylene propylene, rabha re polyurethane, rabha re butyl, rabha re fluorine, rabha re butadiene, rabha re neoprene, rabha re isoprene, rabha re polysulfide, polyethylene yakasanganiswa ne chlorosulfonated...