English to Romanian Tech/Engineering Engineering (general)

"Care and replacement of catalytic liners:
To keep the "stay clean" liners operating efficiently, the oven should be heated to at least 200 degrees whenever heavy soling has occured, in order to avoid permanent soiling"

Cam ăsta-i contextul. Este vorba de manualul de instrucţiuni al unui cuptor electric, iar acestea par a fi nişte garnituri sau "căptuşeli" siguranţă...