D. This is rubberfriction, which contains cords. It's the fresh rejected material during the tire production but it is Unvolcanised. And it's compressed in bales.
含绳层的耐摸生胶，轮胎生产未经加工过的废弃品，经过硫化，并扎成整捆件。
2
They have rubber synthetics that greatly enhance one's friction on the rock.
它们是由橡胶制成的，能够增强在岩石上的摩擦力。
3
With special raw material (raw rubber bearing) and small friction coefficient; electricity -saving.