對(duì)于任意的截面, 比值Mp/My叫做形狀系數(shù).For any section, the ratio Mp / My is called the shape factor.控制單元的形狀是任意的.The shape of the control box is arbitrary.如果它們是可見(jiàn)的, 就可以被動(dòng)態(tài)地放到5個(gè)任意的位置之一.If they are visible, they can be dynamically positio...