this is the Technology Report.There are increasing calls for lawmakersto reconsider copyright lawsthat protect the owners of 3-D printing designs.But there is also concern that extensive lawscould suppress new ideas.3-D printers have spread from scientific labsto industrial workshops to private homes.And prices of 3-D printers continue to drop.Designers demonstrate a large numberof different machines at 3-D print shows.There are models that can producecomplex copies of human organs.There are less costly 3-D printersthat make toys for childrenor parts for home electrical devices.One German automaker recently demonstratedan example of a car structure printed in one piece.And a Chinese manufactureradvertised a house created in a 3-D printer.With the help of computer,almost anyone can print exact copies of many kinds of objects.But they also violate the law in doing so.Julie Samuels is a lawyer with the civil liberties group,Electronic Frontier Foundation.She says people should be careful aboutwhat they create when using 3-D printers."If a certain design that you want to printis covered by copyright,then if you print that you are infringing,arguably, someone's copyright," said Julie Samuels.But 3-D companies are concerned aboutpassing more restrictive copyright protection laws.They think these laws could place banson the rights of citizens.They also believe restrictive copyright lawscould suppress technological invention.Cydni Tetro is the founder of the website 3DPlus.me.She says she expects to see special permission documentsfor 3-D printing very soon."All of those companies are in very active engagements right nowabout how they'll deploy 3-D printed products over the next year,and we're going to see that," said Tetro.Diego Porqueras designs 3-D printers.He says owners of 3-D printersand copyright owners should reach an agreement."If companies really take advantage of thatand just charge nominal fees to download your favorite characteroff 'Star Wars' and 3-D print it,I think that's going to prevent a lot more piracy," said Porqueras.The lack of legislation related to 3-D printingwill not stop the technology from spreading,but experts say they hope new laws will not punish peoplefor printing a copy of something for their personal use.And that's the VOA Learning English Technology Report.For more technology stories,visit our website 51voa.com,更多听力请访问51voa.com