Renal agenesis. Renal agenesis is a medical condition in which one (unilateral) or both (bilateral) fetal kidneys fail to develop.
Polycrystalline cells are composed of multiple silicon crystals, which is a cheaper way to manufacture solar modules. Put simply, these cells are easier for a factory to produce, so they are less expensive. Polycrystalline cells are made by several methods, but most commonly with a cast of molten silicon.
Corrugated fiberboard is a material consisting of a fluted corrugated sheet and one or two flat linerboards. It is made on flute lamination machines or corrugators and is used in the manufacture of shipping containers and corrugated boxes. The corrugated medium and linerboard board both are made of kraft containerboard, a paperboard material usually over 0.01 inches (0.25 mm) thick. Corrugated fiberboard and paperboard are sometimes called corrugated cardboard, although cardboard might be any heavy paper-pulp based board.