31. Her aft torpedo director tower was protected by six-inch walls and a three-inch cast steel roof. 32. The weapon's rails are made out of cast steel and the standard weapon overall weighs 2.1 kg. 33. They are usually made of cast steel . 34. Walther had developed a cast steel , hollow spoke wheel to be used with a solid rubber tire. 35. The last major innovation by PING during the 1960s came with K1 stainless cast steel iron set. 36. It uses MFI fuel injection, has 4 valves per cylinder and features powdered cast steel connecting rods. 37. Another feature is the return of cast steel trucks, which were previously only used on the Rohr cars. 38. The firm was one of the first in the United States to use cast steel to manufacture tools. 39. Media choices include spherical cast steel shot, ceramic bead, glass bead or conditioned ( rounded ) cut wire. 40. There were two bilge keel designs, the earlier design being a pair of essentially square, cast steel plates.
