.04m to mm Is µm the same as mm?

0、 Is µm the same as mm? 1、 What is μm stand for? 2、 Is a millimeter a millionth of a meter? 3、 Is μ the same as μm? 4、 Is μm and um the same? 5、 What is camera μm? 6、 What is 1 millionth of a millimeter called? 7、 How thick is

2022-04-14