Industrial technology

FILE - In this April 22, 2014, file photo. Tesla Motors CEO Elon Musk, right, looks on as a set of Tesla Model S sedans are delivered to its first customers in China at an event in Beijing. Musk said Monday, Jan. 7, 2019 on twitter that the automaker is breaking ground for a Shanghai factory and will start production of its Model 3 by the end of the year. (AP Photo/Ng Han Guan, File)

In this photo provided Jan. 3, 2019, by China National Space Administration via Xinhua News Agency, the first image of the moon's far side taken by China's Chang'e-4 probe. A Chinese spacecraft on Thursday, Jan. 3, made the first-ever landing on the far side of the moon, state media said. The lunar explorer Chang'e 4 touched down at 10:26 a.m., China Central Television said in a brief announcement at the top of its noon news broadcast.(China National Space Administration/Xinhua News Agency via AP)

An image of an iPhone is on display in the background as a customer, left, is helped at the Apple store in the Brooklyn borough of New York, Thursday, Jan. 3, 2019. Apple's shock warning that its Chinese sales are weakening ratcheted up concerns about the world's second largest economy and weighed heavily on global stock markets as well as the dollar on Thursday. (AP Photo/Mary Altaffer)

This photo provided by NASA Jet Propulsion Laboratory, shows the new Mars lander placing a quake monitor on the planet’s dusty red surface. The unprecedented milestone occurred less than a month after Mars InSight’s touchdown. InSight’s robotic arm removed the seismometer from the spacecraft deck and set it directly on the ground Wednesday, Dec. 19, 2018 to monitor Mars quakes.(NASA Jet Propulsion Laboratory via AP)

FILE - In this March 15, 2017, file photo, a sign marks a pick up point for the Uber car service at LaGuardia Airport in New York. Uber will resume testing autonomous vehicles in an area near Downtown Pittsburgh starting Thursday, Dec. 20, 2018. (AP Photo/Seth Wenig, File)

A modified Tesla Model X drives in the tunnel entrance before an unveiling event for the Boring Co. Hawthorne test tunnel in Hawthorne, Calif., Tuesday, Dec. 18, 2018. Elon Musk unveiled his underground transportation tunnel on Tuesday, allowing reporters and invited guests to take some of the first rides in the revolutionary albeit bumpy subterranean tube - the tech entrepreneur's answer to what he calls "soul-destroying traffic." (Robyn Beck/Pool Photo via AP)

An autonomous vehicle called an R1 created to deliver groceries is displayed outside a Fry's grocery store, which is owned by Kroger Co., in Scottsdale, Ariz., Tuesday, Dec. 18, 2018. The fully autonomous vehicle is set begin piloting public roads Tuesday with no back up driver, though it will be monitored by humans in another automobile. (AP Photo/Brian Skoloff)

This March 17, 2017, photo shows an Uber self-driving Volvo in Pittsburgh. The Pennsylvania Department of Transportation has approved Uber's request to resume testing of autonomous vehicles on public roads in the Pittsburgh area. The approval, effective Monday, Dec. 17, 2018, and lasting for one year, comes about nine months after one of Uber's autonomous test vehicles hit and killed an Arizona pedestrian. Testing was suspended after March 18 crash in Tempe, Arizona. (AP Photo/Gene J. Puskar)

Trader Gregory Rowe works at the New York Stock Exchange, Wednesday, Dec. 12, 2018, in New York. (AP Photo/Mark Lennihan)