Udidi lwevalve yesango laseChina: Ngokutsho kwesakhiwo, ukudibanisa kunye nokuhlelwa kwezinto
Udidi lwevalve yesango laseTshayina: Ngokwesakhiwo, uqhagamshelo kunye nokuhlelwa kwezinto eziphathekayo, i-valve yesango ye-China sisixhobo sokulawula ulwelo oluqhelekileyo, isakhiwo sayo esilula, ukutywinwa okulungileyo kunye nezinye iingenelo zenza ukuba isetyenziswe ngokubanzi kwi-petroleum, imichiza, idibene ...
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