毫米

毫米
单位制公制
物理量名称长度
符号mm 
單位換算
1 mm相当于
   美国常用单位   ≈ 0.0032808 ft
       ≈ 0.039370 in
正式定義
機構國際度量衡委員會
「毫米」的各地常用名稱
中国大陸毫米
臺灣公釐(官方);
公厘;毫米(國民教育課本)
港澳毫米
日本

毫米(法語:millimètre英式英语millimetre美式英语millimeter),符號 mm,是長度單位,臺灣稱為「公釐」、「公厘」[1][2]或「毫米」[3],中國大陸稱為毫米。1毫米相當於千分之一公尺(10-3,此即為「毫」的字義),或十分之一厘米

攝影範疇中,底片的制式以毫米為單位,有時會稱為「米厘(milli之音譯)」(糎),「8米厘電影」即為「8毫米電影」。另外機械加工製造所用的尺寸也同樣使用米厘(毫米)來做長度單位

長度單位

現時在台灣,「公釐」等同於「毫米」,即千分之一公尺,也是借用舊制的排列次序:里>引>丈>尺>寸>分>釐

古制單位
台灣借用稱呼 公里 公引 公丈 公尺 公寸 公分 公釐、公厘
中國大陸稱呼 千米 百米 十米 分米 厘米 毫米

换算关系

  • 1 000 000 000 皮米(pm)=1毫米
  • 1 000 000 纳米(nm)=1毫米
  • 1 000 微米(µm)=1毫米
  • 0.1 厘米(cm)=1毫米
  • 0.01 分米(dm)=1毫米
  • 0.001(m)=1毫米
  • 0.000 001公里(km)=1毫米

血壓測量

血壓的測量以毫米汞柱(mmHg)為單位,即一毫米高的水銀柱對液柱底面產生的壓強,約為1(Torr)。

Unicode符號

Unicode為了兼容既有的中日韓(CJK)符號,收納了數個以與「mm」有關的字符:

  • 毫米() - U+339C
  • 平方毫米() - U+339F
  • 立方毫米() - U+33A3

此等字符通常和一個中文字等寬(即「全形」)。

參考

  1. ^ 減少後座力 國軍最新研發衝鋒槍亮相. [2018-06-19]. (原始内容存档于2018-06-19). 
  2. ^ 在《異體字字典·單位詞參考表页面存档备份,存于互联网档案馆)》中,公制以「公釐」稱呼。
  3. ^ 《重編國語辭典修訂本》「毫米 : ㄏㄠˊ ㄇㄧˇ」页面存档备份,存于互联网档案馆)條,可證臺灣地區亦稱「毫米」,也等於毫米

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