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佺ijô㣿


ߣ  ݽʯԭ  2017-11-16

ѯ佺ijȶ೤ô֪Ļʷ佺ijôġ֮Ի⣬ΪDz֪佺ж೤˵̼Ҹ೤ΪǶ೤ʵʱӦҪʺţΪȾǶ೤þ֮󣬲֪佺ijж೤Ϊһһ

Dzߴҷ佺ijôģmmλ׵λ

òDz佺ĵȣ϶ǿԲģⲻĻֱҷ佺Ʒϵıǩǩд佺ʵʵȣ50micȣʱ0.05mmĺȡ

óӲ佺籾Ϊ9mmĺ

佺

óӲ佺ֽܵȦҲǷ佺ֽܵĵһεijȡijΪ89mmijȡȰij89׻׵λҲ89mm100 00.089

佺ֱֽ

㽺ȵķ£

׳ԵȺףٳֽȦֱףٳ3.14 16óĽǷ佺ʵʳȡʽ

9/0.05*0.089*3.1416=50.328ס佺ijȾ50.328ס


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