Bokosi la Ngalande
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Bokosi la Ngalande
Trench Box System ndi njira yothandizira kwakanthawi yopangidwira ntchito za ngalande ndi maziko a dzenje. Yopangidwa ndi chitsulo kapena aluminiyamu, imapanga chotchinga champhamvu choteteza, chomwe chimateteza bwino kugwa kwa nthaka panthawi yogwira ntchito pansi pa nthaka.
Ndi mphamvu yabwino kwambiri yopirira kupsinjika kwa nthaka, imagwiritsidwa ntchito kwambiri mu uinjiniya wa boma, kukhazikitsa mapaipi, kuyala mawaya ndi ntchito zina, kupereka chitsimikizo cholimba cha chitetezo.