问题
问答题 简答题
简述电空位操纵、空气制动阀置“制动”位时作的用原理。
答案
参考答案：
当司机操纵手柄置“制动”位时，柱塞凸轮得到一个降程使作用柱塞右移，调压阀管经柱塞凹槽与作用管相通，同时将作用管原排风通路关闭，作用管增压，由于定位凸轮在此位使微动开关动作，切断排1电空阀的电路，使该电空阀关闭，确保机车的单独制动作用。
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简述电空位操纵、空气制动阀置“制动”位时作的用原理。
参考答案：
当司机操纵手柄置“制动”位时，柱塞凸轮得到一个降程使作用柱塞右移，调压阀管经柱塞凹槽与作用管相通，同时将作用管原排风通路关闭，作用管增压，由于定位凸轮在此位使微动开关动作，切断排1电空阀的电路，使该电空阀关闭，确保机车的单独制动作用。
用方框中所给短语的适当形式填空. (注意: 每个短语仅用一次)
2. The medical team to be sent to the disaster area ____________ 20 members. 3. For miles around me there was nothing but a desert, without a single plant or tree _________. 4. The poor man ____________ two weeks ago, but he refused to go to see a doctor. 5. "You ______________ gather at the school gate at 8 o'clock tomorrow." said the teacher. 6. There was no doubt that the man he ____________ at the meeting yesterday was you. 7. A great many people hold the view that the sentence doesn't ________________ at all. 8. If ______________ the virus, you will easily get infected. 9. The other girl rushed ____________ me. I felt ashamed as I lagged farther and farther behind. 10. — You may _______________ playing the piano at midnight by your neighbors. — I know. They never say anything favorable to me. |