I=17 B=1.2 L=0.25 a=60 F=?
F=I*B*L*sina=17*1.2*0.25*0.866=4.42 H
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I=17 B=1.2 L=0.25 a=60 F=?
F=I*B*L*sina=17*1.2*0.25*0.866=4.42 H
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