English to Dutch Tech/Engineering Mathematics & Statistics

In a manual for a calculator:

To use Z clipping, call TRIANGLE_P to create a Z clipping string (initialized at 255 for each pixels). You can then call LINE_P with appropriate z (0-255) values for each of the triangle vertexes and LINE_P will not draw pixels further than the already drawn pixels. ZString is automatically updated as appropriate.

How do we call Z clipping in Dutch? Tried to google it, but did not find.