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.
Richlite is a phenolic resin / cellulose compound material produced by Richlite Company. Like other phenolic resin / cellulose compound material it is a dense material made from partially recycled paper and phenolic resin.