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PCB/FPC中常用的单位换算

全世界都在使用公式单位了,TMD美国佬还在使用英式单位,也不怕麻烦,从这点都能看出美国佬的高傲,有什么办法呢,人家有高傲的资本。人家的航天飞机都要退役了,中国还没有,这就是差距!


1inch(英寸) = 25.4mm(毫米) = 1000mils(千分之一英寸);
1m(米) = 3.28foot(英尺);
1foot(英尺) = 12 inch(英寸);
1mils(千分之一英寸) = 25.4um(微米) = 1000uinch(微英寸);
1M2(平方米) = 10.7638 SF(平方英尺);
1SF(英尺) = 144 square inch(平方英寸);
1OZ(盈司) = 35um(微米);
1OZ(盈司) = 1.38mils(千分之一英寸);
1Lt(公升) = 1dm3(立方分米);
1Lt(公升) = 61.026 cubic inch(立方英寸);
1Kg(公斤) = 1000g(克);
1LB(英镑) = 453.92g(克);
1Kg(公斤) = 1000g(克);
1Kg(公斤) = 2.20LB(英镑);
1Kg(公斤)= 9.8N (牛顿);
1m(米) = 10dm(分米) =100cm( 厘米) = 1000mm(毫米)
1mm (毫米)= 1000um(微米);
1um(微米)= 1000 nm(纳米);
1Gal(加仑) = 4.546 Lt(公升) 英制;
1Gal(加仑) = 3.785Lt(公升)美制;
1PSI(磅/平方英寸)= 0.006895Mpa(兆帕斯卡);
1Pa(帕斯卡)= 1N/m2(牛顿/平方米);
1bar(巴) = 0.101Mpa(兆帕斯卡);
1克 = 5 克拉.

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