Adjective subordinate clauses and its types
I heard that in Chinese(Mandarin) there is no distinction between essential and nonessential adjective subordinate clauses. So I would like to know how the following sentences would be distinguished from one another in Chinese:
-The computers which were made in the United States were all bought by that man.(According to this sentence, only the computers which were made in E.U.A. were bought, the ones which were produced in other countries weren't bought.)[This one is the essential one.]
-The computers, which were made in the United States, were all bought by that man.(According to this sentence, all computers in the store were produced in the E.U.A., with that being just a detail.)[This is the nonessential one.]
Thank you beforehand for answering and have a nice day!