Isisindo sesilayidi ngokwesihloko sithi KN. Ukuze uvimbele isilayidi singashabalali phansi ngenxa yethonya lamandla adonsela phansi, ngalesi sikhathi, isisindo sesilayidi singalinganiswa ngezindlela ze-hydraulic. Isikhathi sokuqala nesibambile sedrayivu ye-hydraulic kusethelwe kuso
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