31. They have internal diameters of six metres and their shafts end approximately three metres above ground level. 32. The two tubes, with an internal diameter of, were made from thick rings of cast iron. 33. To take a typical example, consider an autoclave with an internal diameter and a working length of. 34. The internal diameter of the pipe is and capacity is 7.6 bcm of natural gas per year. 35. The original fort was circular in shape with an internal diameter of 30 feet and walls 11 feet thick. 36. For flow in a pipe or a sphere moving in a fluid the internal diameter is generally used today. 37. The bored tunnels have internal diameter of and were driven by a diameter Herrenknecht earth pressure balance tunnel boring machine. 38. Conical in form and with a internal diameter 106 metres of external diameter and an overall height of. 39. For human use, tubes range in size from 2 to 10.5 mm in internal diameter ( ID ). 40. The tunnel from the dam to the power station, with an internal diameter of, creates a gross head of.
