Is there a general rule that allows to replace "noun + that + verb" with "noun + ing-form of verb"?
Consider this sentence:
Metal physical properties are key traits that determine the quality of products.
Can this be written as:
Metal physical properties are key traits determining the quality of products.
The second sentence already has a main verb and key traits is it an object? I am confused.
I would like to know in general when can "that" be omitted? If this question has already been asked I can't find it through the search.