??????Ҫ?ڼ????????С?????˵??????Ǹ?????Ҫ????Ʒ?????㲻֪????ô????????ʵ?ʱ???Ϳ???ѡ??DIY????????????ܿ????????Ҫ?????Ĵ?С?ͷ??ã??????ʡ?ܶ?ʱ?????Ǯ??
DIY?????????ʲô??
DIY?????????????ɫ
?????Դ??????????֪ʶ??ʹ?ð???
??ճ??״???????ͼ??˵??
??????????ݿ??ټ?????϶??ٺͼ۸????С
DIY?????????ô??
DIY???????ʹ?÷???
????????DIY??ijߴ?(????????????????)??
?ߴ絥λ?????? = ????
Ĭ?ϲ????۸?100Ԫÿƽ????Ĭ??ĥ?۸?2Ԫÿ??
???????İ?ť?????ܵ???????
DIY?????????????????
DIY?ߴ磨20cm X 20cm X 20cm????ȣ?5mm???????????????
????һ?????????Ŀ??Ÿ?
????20cm X ????20cm ?IJ???һ??(??)?????鲣???? 0.04 ?Oƽ????
????20cm X ????19.5cm ?IJ???????(ǰ??)?????鲣???? 0.039 ?Oƽ????
???? 19.5cm X ????19cm ?IJ???????(????)?????鲣???? 0.03705 ?Oƽ????
????????õIJ????????Ϊ??0.1921 ?Oƽ???ף?????????ľ??????
?ϼƲ???????????Ϊ??2.40125 kg
??????????????Ŀ??Ÿ?
????19cm X ????19cm ?IJ???һ??(??)?????鲣???? 0.0361 ?Oƽ????
????20cm X ????20cm ?IJ???????(ǰ??)?????鲣???? 0.04 ?Oƽ????
????20cm X ????19cm ?IJ???????(????)?????鲣???? 0.038 ?Oƽ????
????????õIJ????????Ϊ??0.1921 ?Oƽ???ף?????????ľ??????
?ϼƲ???????????Ϊ??2.40125 kg
??????
???????úϼƣ??????0.1921ƽ???? X ÿƽ??100Ԫ = 19.21Ԫ
ĥ?߷??úϼƣ??ܱ߳?3.92?? X ÿ??2Ԫ = 7.84Ԫ
?ܹ????úϼƣ?27.05 Ԫ
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