A.球形容器的經(jīng)向應(yīng)力與環(huán)向應(yīng)力相等 B.圓筒形容器的經(jīng)向應(yīng)力與環(huán)向應(yīng)力相等 C.球形容器的經(jīng)向應(yīng)力大于環(huán)向應(yīng)力 D.圓筒形容器的經(jīng)向應(yīng)力大于環(huán)向應(yīng)力
A.Q235A-F B.20R C.20g D.1Cr13
A.攪拌漿實心軸變?yōu)榭招妮S B.矩形梁變?yōu)楣ぷ咒摿?br /> C.圓形梁變?yōu)椴垆摿?br /> D.槽鋼梁變?yōu)楣ぷ咒摿?/p>