表1-8國(guó)家選定的作為法定計(jì)量單位的非SI的單位量的名稱(chēng)單位名稱(chēng)單位符號(hào)換算關(guān)系和說(shuō)明時(shí)間分[小]時(shí)日(天)minhd1min=60s1h=60min=3600s1d=24h=86400s[平面]角[角]秒[角]分度″′°1″=(π/648000)rad1′=60″=(π/10800)rad1°=60′=(π/180)rad旋轉(zhuǎn)速度轉(zhuǎn)每 (共 398 字) [閱讀本文] >>