De or het raambediening?

The correct Dutch article is:

de raambediening

Rule Words ending in -ing: almost always de. See the rule

How to use raambediening

the raambedieningde raambediening
this raambedieningdeze raambediening
that raambedieningdie raambediening
our raambedieningonze raambediening
your raambedieningjouw raambediening
every raambedieningelke raambediening
which raambediening?welke raambediening?
a big raambediening / the big raambedieningeen grote raambediening, de grote raambediening