Inkqubo yokuvelisa ucingo oluhlabayo lwahlulwe lwaba: uhlobo olulukiweyo, uhlobo lwe-welding, uhlobo olusikiweyo, uhlobo lwesitampu, uhlobo olujikelezileyo, isikrufu ngokwendalo, uhlobo lwe-anchorage, njl.Ucingo oluhlabayo ngakumbi uphuhliso kunye nokukhula, kunye ne-var yanamhlanje ebanzi ...
Funda ngokugqithisileyo