Mohlomong re na le lisebelisoa tsa tlhahiso-tsa-bonono tsa bonono, tse nang le boiphihlelo le basebetsi ba tšoanelehang, ba lemohileng ka libaesekele tse nang le litlolo tsa China Ethene le morekisi | Vonsland motlakase, Mokete oa Metsotso , Karolelano ea litšenyehelo tsa ho fumana thepa ea koloi ea motlakase , Likoloi tse tšoanelehang bakeng sa mokoloto oa koloi oa koloi ea motlakase ,Etella pele betri ea acid ka likoloi tsa motlakase . Litheko tse ntle tsa boleng le tsa tlholisano li etsa hore lihlahisoa tsa rona li natefeloe ke botumo bo phahameng hohle ka lentsoe. Sehlahisoa se tla fana ka lefatše lohle, joalo ka Europe, Amerika, Cologne, Australia, e romelletse lihlahisoa tsa rona lefats'eng lohle, haholo-holo linaha tsa USA le tsa Europe. Ho feta moo, lihlahisoa tsohle tsa rona li etsoa ka lisebelisoa tse tsoetseng pele le litsamaiso tsa QC ho netefatsa boleng bo phahameng. Ha u ntse u tsilatsila lihlahisoa tsa rona tse phahameng. Re tla leka sohle se matleng a rona ho khotsofatsa litlhoko tsa hau.