题目内容
光滑极限量规是根据包容原则综合检验零件尺寸与形状的无刻度专用计量器具。
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光滑极限量规通规的公称尺寸等于工件的上极限尺寸。
通规用于控制工件的体外作用尺寸，止规用于控制工件的提取组成要素的局部尺寸。
校对量规是用来检验工作量规的量规。
Cet-4-1.12-Exercise 01F) Many members of the immobile class, on the other hand, live in the America of the gloomy headlines. If you have no specialized skills, there's little reason to uproot to another state and be the last in line for a low-paying job at a new auto plant or a green-energy startup. The surprise in the census data, however, is that the immobile workforce is not limited to unskilled workers. In fact, many have a college degree.
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