The form of the formula is simple, and it can control the internal force in the required bound effectually.

公式形式简单，能有效地将内力控制在所需范围内。

youdao

The form of the formula is simple, and it can control the internal force in the required bound effectually.

公式形式简单，能有效地将内力控制在所需范围内。

youdao