Astorm is classed as a supertyphoonif it reaches maximum sustained 1-minutesurface winds ofat least 65 m/s (145mph), theequivalentof a category-five hurricane in the Atlantic basin.
如果一场风暴保持65 m/s (145mph)的风速至少1分钟将被归到超级台风类,等同于大西洋盆地五类飓风的等效。
What's more, a machine-made surface produces the wrong kind of friction: to do its job precisely, the plate's surface needs minute scorings, of only a few microns each, where machine oil can reside.