Iimfumba ze-Screw
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Iimfumba zokukrola zokwakha isiseko esinzulu
I-Screw piles sisikrubhu sentsimbi yokugquma kunye nenkqubo yeankile yomhlaba esetyenziselwa ukwakha iziseko ezinzulu. Iimfumba ze-Screw ziveliswa kusetyenziswa ubukhulu obahlukeneyo bemibhobho ye-tubular amacandelo engqumba okanye i-ankile shaft.