单词	span of a beam
释义	span of a beam 梁之跨距
随便看	skin-frictional resistance skin friction coefficient skin-friction coefficient skinfriction construction skin friction distribution skin-friction distribution skin friction drag skin-friction drag skin friction effect skin-friction effect skin friction force skin-friction force skin friction, frictional drag skin friction loss skin-friction loss skin friction of pile skin friction resistance skin-friction resistance skin friction resistance of pile skin friction stress skin friction temperature skin-friction temperature skin friction theory skin friction value skin-friendly