De or het klemverbinding?

The correct Dutch article is:

de klemverbinding

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

How to use klemverbinding

the klemverbindingde klemverbinding
this klemverbindingdeze klemverbinding
that klemverbindingdie klemverbinding
our klemverbindingonze klemverbinding
your klemverbindingjouw klemverbinding
every klemverbindingelke klemverbinding
which klemverbinding?welke klemverbinding?
a big klemverbinding / the big klemverbindingeen grote klemverbinding, de grote klemverbinding