1. Ho ea ka thepa eo, e arotsoe ka libolo tse tlaase tsa carbon, libolo tsa tšepe tse mahareng tsa carbon, libolo tse phahameng tsa carbon, lisebelisoa tsa mantlha ke 1010-1015, 1045, 1085, jj .; 2. Ho ea ka thatafalo, e arotsoe ka libolo tse bonolo le libolo tse thata, e leng ho ahlola hore na kalafo ea mocheso ke ...
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