De or het klemspanning?

The correct Dutch article is:

de klemspanning

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

How to use klemspanning

the klemspanningde klemspanning
this klemspanningdeze klemspanning
that klemspanningdie klemspanning
our klemspanningonze klemspanning
your klemspanningjouw klemspanning
every klemspanningelke klemspanning
which klemspanning?welke klemspanning?
a big klemspanning / the big klemspanningeen grote klemspanning, de grote klemspanning