gbv
vZ
\¢
fŹ«\(Ē)
*vZ®
fŹĻ A=Ī(d^2-(d-2t)^2)/4
}S²Źu e=d/2
fŹ2Ó°ŅŻÄ I=Ī(d^4-(d-2t)^4)/64
fŹW z=Ī(d^4-(d-2t)^4)/32d
fŹ2¼a i=ćI/A
d=
.
cm
t=
.
cm
*PŹÉÓ
* ÜÅQllÅ·
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