GE began selling Lexan in 1957. A potential replacement for glass and metal, it was used for everything from electric coffeemakers to the light covers on the wings of supersonic aircraft.

通用从1957年开始销售聚碳酸酯以逐步取代玻璃和金属，它的应用非常广泛，从电子咖啡机到超音速飞行器的表面材料。

youdao

Built from a box fan, medium-density fiberboard, lexan and aluminum, the tunnel increases airspeed by about 240 percent and cools its contents with a brisk 9 mph breeze.

ENGADGET: Wind tunnel PC case pushes the air cooling envelope, does its thing for cancer research

Once sidled up to the building, a crew uses a scissor lift to unload giant enclosures made of Lexan and aluminum, dubbed Universal Load Devices (ULDs), which can weigh up to two tons each.

ENGADGET: Inside UPS' Worldport: How a shipping titan moves 2,000 packages every 17 seconds

The company identified 17 products that met its standard of providing "significant and measurable environmental performance advantages, " including a Lexan film that replaces conventional paint, Harmony water-conserving washing machines, the new fuel-efficient GEnx jet engine and GE's Evolution locomotive, a 208-ton, 4, 400hp workhorse that burns 3% less fuel and puts out 40% less pollution than its immediate predecessor.

FORBES: Magazine Article