Key components of the engine are produced to an accuracy of just one micron ( the diameter of an average strand of human hair is about 100 microns ) and range from gear sets to steering rack and column .
Aluminum , for instance , cannot burn at micron levels , or one millionth of a meter , but burns and gives off an intensely glowing light at nano levels , or one billionth of a meter .
Studies of ash captured from the air show that for every one of the largest particles ( about 300 microns ) there are a million or more in the 2 micron range .
研究从空中获取的灰尘,表明在2微米的范围内,有一百万或更多的超大颗粒(300微米左右)。
These grains were about half a micron in size , far bigger than previously thought .
这些颗粒大约半微米大小,比预想的要大许多。
Ash particles are normally in the 50-100 micron ( 0.05 to 0.1 millimetre ) range .
灰粒大小通常在50-100微米(0.05到0.1毫米)之间。
That problem was due largely to the fact that the coating was only a fraction of a micron ( millionth of a metre ) thick .
这主要是由于涂层的厚度仅为几微米(百万分之一米)。
And it makes predictions ; at micron scales the attraction between two masses will no longer depend on the square of the distance between them in the way that physicists since newton have required it to .