5mm最初电子元器件都来源于美国/英国等西方发达国家,用的是英制尺寸;很大多数直插元件的管脚间距都是100毫英寸(mil),TO252,晶体管有SOT23,2mm,即2.54毫米,找厂家的规格书看看再画。
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你可能觉得百吉饼尝起来不咸,但一块典型的4英寸(10厘米)大的燕麦百吉饼却含将近532毫克的钠。
You may not think a bagel tastes salty, but a typical 4-inch (10-centimeter) oat-bran bagel has about 532 mg of sodium.
每年至少有2032毫米(80英寸)的降雨量才算是正常;有些地区的年降雨量可能高达10922毫米(430英寸)。
At least 80 inches of rain a year is normal and in some areas there may be as much as 430 inches of rain annually.
这个区域的平均年降雨量为149至216毫米(小于1英寸),湖泊所在的盆地多数时候干涸为盐田。
This area receives 149 to 216 millimeters of rainfall a year on average, and the basins pass most of their time as saltpans.
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