1 an open structure that gives shape and support to something, such as the transverse stiffening ribs of a ship's hull or an aircraft's fuselage or the skeletal beams and uprights of a building. 2 an enclosing case or border into which something is fitted.
Metal; Ferrous Metal; Austenitic; Cast Iron. Material Notes: Type CRS is an austenitic material with graphite in the nodular form. It conforms to ASTM designation A439-60T and provides much higher strength than type CR with excellent resistance to corrosion, wear and heat.
Found in blood samples from 10 of 10 Washingtonians in the Pollution in People study. Perfluorinated compounds (PFCs) are a family of fluorine-containing chemicals with unique properties to make materials stain and stick resistant.PFCs are incredibly resistant to breakdown and are turning up in unexpected places around the world.here are many forms of PFCs, but the two getting attention recently are: 1  PFOA or perfluorooctanoic acid, used to make Teflon products. 2  PFOS or perfluorooctane sulfonate, a breakdown product of chemicals formerly used to make Scotchgard products.