Miniature herringbone gears Image credit: Run Ryder | Perpendicular herringbone gears Image credit: Wikimedia | Crossed double helix gear Image credit: 1 DKM 2B. Herringbone gears, also called double helical gears, are gear sets designed to transmit power through parallel or, less commonly, perpendicular axes. The unique tooth structure of a herringbone gear consists of two adjoining, opposite helixes that appear in the shape of the letter 'V'.
More Dell - Tech Support 800 numbers and support. This is the best of 11 ways to contact Dell - Tech Support according to 330378 GetHuman users. Below you can compare the many ways to contact Dell - Tech Support customer service. 877-293-1197.
Instructions. Close the screen of your Dell Latitude laptop. Turn the laptop over. Look for a tag containing a five-to seven-character code that includes numbers and letters. This code is the computer's serial number.The tag is located near the middle of the back of the computer, on a thin white strip.On Dell laptops, the serial number is also referred to as the service tag.nstructions. Close the screen of your Dell Latitude laptop. Turn the laptop over. Look for a tag containing a five-to seven-character code that includes numbers and letters. This code is the computer's serial number.