For groups of rules that share a set of common attributes and have similar structure, it can be convenient to maintain in a tabular form.
对于具有相同属性和相似结构的规则组，以表格形式表示它们比较方便。
Fatigue failure of metal structural component is a common form of structure collapse, so improving fatigue behavior of metal materials is very important for their usage.
金属构件的疲劳失效是一种常见的结构破坏形式，改善金属材料的疲劳性能对其使用性能的提高有重要意义。
When the pin switch is pushed on, the handle and the tool bar form into an integral structure, which can be used as a common screwdriver.
回拧时，将销子开关推上，刀柄和刀杆形成整体，作为普通螺丝刀使用。
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