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maintain means thers limit or standard,while service is with effort and care
To maintain unit like aircondition repair.service give for ur iffort
TO Maintain is to monitor and service is to resolve an issue
La maintenance elle même est un facteur très important parmi plusieurs,qui rendait service au client,alors la différence que la maintenance est inclut dans le service au client afin de maintenir la satisfaction et la fidélité
To Maintain : to keep in good condition by making repairs for breakdown, correcting problems and preventive to avoid breakdown
To Service : the service is depend on time for example the service contract for checking machine condition will be once or twice per month; also for car the service will be after 10 km for changing the oil and filters.
