由于铸造圆角或锻造圆角的影响,零件表面的交线(相贯线)变得不够明显了,但仍要画出,这时的交线称为过渡线,用()表示。(从细实线、粗实线中选择)
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梯形螺纹的特征代号为()。(从M、Tr、B、G)中选择。
气动方向控制阀按其作用特点可分为单向型和换向型两种。()
液压缸按结构分为活塞式、柱塞式、叶片式和伸缩式等四种。
Metaphor is continuous and incomplete categorization. Tenor and vehicle have their own respective categories while the process of metaphor projecting is from vehicle categorization to tenor categorization, which is one-way and nonreversible.