I-Lianggong Trench Box Ship eya phesheya kwezilwandle

I-Lianggong Trench box ithunyelwa emazweni aphesheya kwezilwandle

I-Trench Box yakhelwe ngokukhethekile ukwesekwa konqenqema ngesikhathi kumbiwa umsele, ikakhulukazi iqukethe i-base plate, ipuleti eliphezulu, induku esekelayo nesixhumi.

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