The Deathclaw Gauntlet aka: Murder Glove. A staple of the crafting bench in Fallout 3, these days the Deathclaw Gauntlet is a little bit harder to come by for the average Wasteland citizen. But if you follow these steps you can get your hands on one for the mere price of killing a Deathclaw.
An isobar refers to all of the nuclides of all elements that have a particular atomic mass. For example, helium-6 is one of the many isotopes of helium. The isobars of helium-6 are hydrogen-6, lithium-6, beryllium-6, and boron-6. (Note, hydrogen-6, beryllium-6, and boron-6 are unbelievably short-lived).
The purpose of a trackbar is to prevent movement of the axle/wheels from side to side. The adjustable trackbars will keep the axles centered (left to right) under the vehicle once lifted. Think of it as a right triangle. The axle is the base of the triangle, and the trackbar is the hypotenuse (diagonal line). If the vertical rise changes but the base does not, then the hypotenuse (the track bar in this case) would have to change or be adjusted to compenate for the new vertical height. If the trackbar is not adjustable then the axle will shift more to one side and no longer be centered under the vehicle.