How do I duplicate these chips?
Here is a pretty good looking description:
http://www.twirlandtaste.com/2012/07/crispy-green-bean-chips-la-low-carb.html
They suggest the following procedure:

Wash the fresh, small green beans in cold water.
Cut off and tough ends.
Steam blanches the beans by placing a few inches of water in the bottom of a pot and bringing to a boil. Make sure the water is not high enough to get inside the steamer pan. Place beans in steamer pan or wire basket and steam for three to four minutes.
Remove beans from steamer and plunge into cold or ice water for five minutes to stop the cooking process. Drain beans with strainer.
Place green beans on a cookie sheet in single layer. Freeze for 45 minutes.
Cook in the oven on the cookie sheet at 140 degrees until the beans are crisp and all moisture has been removed. Cooking times vary and may take 8 -14 hours.
If using a food dehydrator, place beans on dehydrator tray and cook at 135 degrees Fahrenheit for 8 -12 hours until crisp.