10 in=254mm
50 ft=12*50 in=600*25.4=152400mm
343g铝箔纸的体积=343/2.702≈126.943cm^3=126943mm^3
设其厚度B
B*254*152400=126943
B=3.28*10^(-3)mm=3.28微米
10 in=254mm
50 ft=12*50 in=600*25.4=152400mm
343g铝箔纸的体积=343/2.702≈126.943cm^3=126943mm^3
设其厚度B
B*254*152400=126943
B=3.28*10^(-3)mm=3.28微米