second of arc
常見例句
- One second of arc movement is one thirtieth of a millimetre.
一弧秒的移動是一毫米的三十分之一。 - When rotatory table is control by step motor with 360:1 reduction rate worm barring gears, one second of arc resolution can be achieved.
儅步進電機通過360：1減速比蝸輪副控制鏇轉(zhuǎn)工作臺時，可獲得1角秒的分辨率。 - Dynamic process of current is controlled quickly by the first inverter, and arc polarity is controlled by the second inverter of arc welding power source.
弧銲電源一次逆變控制電流快速動態(tài)過程，二次逆變控制電弧極性。 - The largest optical telescopes on earth can distinguish between things that are separated by about one second of arc (a 1, 296, 000th of the celestial equator).
ECONOMIST: Pulsars: In a wink The - Its resolution is 30 billionths of a second of arc.
ECONOMIST: Pulsars: In a wink The - That would give it a resolution of a few thousandths of an arc-second—enough, were this an optical rather than a radio telescope, to see a boulder just a few metres across on the surface of the moon.
ECONOMIST: Radio telescopes 返回 second of arc