Ityala leNtsebenziswano Umbhobho we-polyurethane fracturing werhasi ye-shale Umbhobho wokubonelela ngamanzi okunkcenkceshela kwezolimo Uthutho oluludaka Umbhobho wepolyurethane Umbhobho we-polyurethane flat Umbhobho womlilo kamasipala Ityala leNtsebenziswano
