☆Ububanzi beHole Φ22
☆Umzimba webhokisi wenziwe ngeplastiki yobunjineli enganyangekiyo ngumhlwa
☆Isetyenziswa kwi-petroleum, kwishishini leekhemikhali, kwi-metallurgy nakwezinye iimeko zothuli oluphezulu, kwi-acid ebuthathaka nakwi-alkali ebuthathaka ebolileyo