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从基本原理入手,说明HXN5机车备用空气制动的正确操作方法以及使用中的注意事项,使读者了解备用空气制动对于HXN5机车行车安全的重要性以及乘务员正确、熟练使用备用空气制动的紧迫性。
Starting from the basic principles, explain the HXN5 locomotive spare air brake the correct operation method and the use of precautions to enable readers to understand the backup air brake for HXN5 locomotive traffic safety and flight attendant is correct, skilled use of spare brake air tightness Sex.