The invention relates to the use of diffusion spectrum magnetic resonance imaging to map complex fiber architectures in tissues. The biasing member biases backward in the extending direction the housing body that is in a state where the housing body has relatively moved forward in the extending direction of the extension section, and a position in a front-and-back direction of the biasing member is close to the front compared to positions in a front-and-back direction of the supply reel and the winding reel. The invention further relates to hybrid cotton seeds and plants produced by crossing the cultivar L-1851 with another cotton cultivar. The engine also includes a gearbox having a third housing connected to the first housing and the second housing, a pinion gear, and a low-speed gear connected to the generator rotor and at least partially supported by the low-speed bearing. The rolls are unrolled over the land area so that longitudinal edge portions of adjacent rolls adjoin one another. A heavy media system or a sand float process can be used either alternatively or additionally.