Mokotlana oa lehlabathe ke mokotla kapa mokotla o entsoeng ka polypropylene kapa thepa e 'ngoe e tiileng e tlatsitsoeng ka lehlabathe kapa mobu' me e sebelisetsoa merero e kang ho laola likhohola, tšireletso ea sesole ka har'a liforo le li-bunkers, ho sireletsa lifensetere tsa khalase libakeng tsa ntoa, ballast, counterweight, le lits'ebetso tse ling tse hlokang fortification ea mehala, joalo ka ho eketsa ts'ireletso e ntlafalitsoeng ho likoloi tsa lihlomo kapa litanka.