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Spark plugs are directly related to engine performance. Different models require different types of spark plugs, and the replacement interval should be determined based on the manufacturer's manual and actual test results. For instance, the Volkswagen Passat 7-speed dual-clutch 8th version previously used resistor spark plugs, with the manufacturer recommending a replacement every 20,000 miles. Similarly, Cadillac models generally require a replacement every 100,000 miles, with variations depending on the vehicle. In reality, there's no need to replace them so frequently. However, if the vehicle experiences increased body vibration, slower acceleration, or difficulty starting, it's time to check or replace the spark plugs promptly.

●Low-floor Buses: The low-floor buses, which gained popularity in the late 20th century, have lower floors than older models, closer to the road surface, and no steps. Buses with a completely low floor are called low-floor buses, while those with a few steps in the rear half and a flat floor in the front are known as low-entry buses. These buses are equipped with facilities to accommodate passengers with mobility issues (such as wheelchair users) and reduce the time needed for boarding and alighting. Low-floor buses are common in Hong Kong, where Kowloon Motor Bus Company introduced them. With the increasing demand for accessible transportation in Hong Kong and the opening of the new airport, all bus companies were required to provide low-floor bus services for airport routes. Since then, all Hong Kong bus companies have only purchased environmentally friendly low-floor buses. In mainland China, low-floor/entry buses are not yet widespread, only operating on a few routes in major cities. Among them, Beijing has a higher ratio of low-floor buses, with the first batch purchased in 2008, reportedly to welcome the 2008 Beijing Olympics.

We are focusing on increasing energy supply through multiple channels. In recent years, to effectively address the challenge of driving range, battery technology has made continuous breakthroughs, and fast-charging technology has become a competitive direction for enterprises. Some car manufacturers have actively pushed forward, applying fast-charging technology to mass-produced models while also accelerating the construction of fast-charging stations for new energy buses. Moreover, the battery swapping model is an important part of the energy补充 system. Taking a certain car brand as an example, during this year, the average time for users to swap batteries at high-speed charging stations is 1 minute, supplementing energy in a battery swapping mode. To improve the energy supplement system, it's advisable to take a multi-pronged approach, providing energy through various channels, and by optimizing the configuration of charging and swapping stations, effectively enhancing charging efficiency.

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