Task: Translation
Input (Xhosa): Ezi zinto zingaqinanga ziyathintelwa ekuxubaneni okanye ekuchithekeni ngaphambi komsebenzi ngokuvalwa ngeevalvu ezimbini zerabha ezidityanisiweyo kunye.
Output (English): These liquids are prevented from mixing or spilling before operation by being sealed with two rubber valves coupled together.