Methods, nucleic acid sequences, and transformed duckweed plant or duckweed nodule cultures for the expression and the secretion of biologically active polypeptides from genetically engineered duckweed are provided. According to the invention, a carbonaceous reducing agent is charged to the lower furnace of a suspension smelting furnace via tuyeres to the part of the furnace which has a reduced cross-sectional area. At least one processor of utilizes the local surface shape information received from the sensor nodes to generate one overall model of a surface shape of the entire surface of the body part covered by the garment. The perforations are sized such that fat is collected within the inner chamber, while fluids and other materials are drawn through the perforations, away from the collected fat. A pair of retaining arms are provided whereby, upon rotation of the threaded member to raise the nut in the direction of the deck, the retaining arms will bend outwardly and engage the underside of the deck to clamp the faucet to the deck.