Since the invention of Ductile Iron, also known as Spheroidal Graphite Iron or Nodular Cast Iron in 1949, it has become the most preferred pipe material for water supply and pressure sewerage applications around the world.ince the invention of Ductile Iron, also known as Spheroidal Graphite Iron or Nodular Cast Iron in 1949, it has become the most preferred pipe material for water supply and pressure sewerage applications around the world.
The 1994 Federal Register TRI listing of chlorsulfuron (59 FR 1788, January 12, 1994) also cited a slight treatment-related decrease in maternal fertility in the F3 generation observed in a rat chronic toxicity study (Ref.
Thalidomide was first developed by a German pharmaceutical company called Gruenenthal grÃ¼nenthal In stolberg Near. Aachen the company secured its patent for the drug in, 1954 which lasted twenty. Years clinical trials started by the company led to the promotion of thalidomide for treating respiratory infections as early as. 1956