31. Sandbags filled with tailings from the mine dam were used, interspersed with air gaps and timber walls. 32. This is because the air gap will eventually become too large for the magnetic field to overcome. 33. An air gap can cause a dangerous pressure spike condition causing bursting of the chamber, cylinder, or barrel. 34. External shading, or a radiant barrier plus air gap , may be used to reduce undesirable summer solar gain. 35. It also says that the air gap needs to be about 1mm per thousand volts applied to it. 36. The vapour passing through the membrane must additionally overcome this air gap before condensing on the cooler surface. 37. As with any black-powder load there should never be an air gap between the powder and the bullet. 38. The only connection between them was a 5-millimeter air gap between the top of the wall and the lid. 39. The aim in this work was to determine the parameters that characterise the air gap mmf of the winding. 40. Leave a one-inch air gap .
