31. A twelve module LH2 / LOX aerospike engine was arranged around the rim of the base, covered by movable metal shields . 32. Each tree bore a metal shield with the name of a soldier from the Shire of Stephens who had died in the war. 33. An engraved metal shield , with diagonal stripes in the winning school's colours, is added to the University Cup every year. 34. The design of the batteries included a domed metal shield that covered each gun pit was intended to protect the gun from incoming shells. 35. A thin metal shield is needed around a GM tube to provide energy compensation to enable it to be used for dose rate measurements. 36. It included both types of stabilization; its aluminum walls acted as the metal shield , and a series of secondary magnets ringed the torus. 37. Visiting shuttle astronauts delivered six metal shields to the space station in June and hung the 109-pound ( 49-kilo ) stack outside. 38. Visiting shuttle astronauts delivered six metal shields to the space station in June and hung the 109-pound ( 49-kilogram ) stack outside. 39. On both sides of the room, there are metal shields shaped to look like people, except with a hole where the heart should be. 40. Only recently, Kumlin said, has her husband gotten a metal shield for the gunner's turret he regularly mans, after months of asking.