There is an exceptional case, three forces with paralleled lines of action, which will be discussed in Chapter 3.

三个力的作用线相互平行的例外情况，我们将在第三章讨论。

youdao

There is an exceptional case, three forces with paralleled lines of action, which will be discussed in Chapter 3.

三个力的作用线相互平行的例外情况，我们将在第三章讨论。

youdao