During experiments with inclined planes at various heights, students should always keep their planes more steeply slanted than this lowest-height inclined plane.
(students; should keep; their planes; T:During experiments with inclined planes at various heights; T:always) (their planes; more steeply slanted; )
students their planes
should keep more steeply slanted
their planes T:During experiments with inclined planes at various heights T:always