A plane through G perpendicular to this vector has a fixed direction in space, and is called the invariable plane; it may sometimes be conveniently used as a plane of reference.
But this is nothing but Askenasy’s “fixed direction of variation”--i.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "fixed direction" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
