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Lilense tsa likhalase tsa letsatsi tsa CR39
Likhalase tsa letsatsi ke mofuta oa lihlahisoa tsa tlhokomelo ea pono ho thibela tšenyo ea mahlo a motho e bakoang ke khanya e matla ea letsatsi. Ka ntlafatso ea thepa ea batho le boemo ba setso, likhalase tsa letsatsi li ka sebelisoa e le lisebelisoa tse khethehileng bakeng sa botle kapa mokhoa oa botho.
