First, the cancellation of some prompts requires students to observe and judge independently. Before the students in the subject three test mainly rely on the prompt tone, according to the prompt tone to operate, but the subject of the current biggest change is to completely cancel the "through the crosswalk, school, bus station" and other prompts, the students must consciously and consciously through the need to slow down The road conditions, make a deceleration brake give way, without deceleration to make the exam directly unqualified. The trainees must observe on their own to achieve safe and civilized driving, and the examinations should be closer to life. Second, the device identification range is about 30 meters, brake pedals also deduct points. When passing trains, crosswalks, schools, and bus stops, trainees must judge the distance between 30 meters and 30 meters. Otherwise the system could not be identified and it would be interpreted without brakes and the test would be directly disqualified. It takes more time for trainees to practice their cars, increase their sense of vehicle, and determine the best timing for braking. Third, the turn signal does not make up after the automatic extinguishing, failed! The new regulations focus on the lighting requirements are particularly stringent, turning lights should be played in advance turn, if the turning lights turn midway, you need to make up the lights in time, otherwise it will lead to unsatisfactory test scores. In many projects, it is necessary to turn on the turn signal and it takes only three seconds. The details are more and the student needs more memory. Fourth, in order to avoid the risk of blind spots, remember to "review." The new regulations changed the previous observations of the heads into observations, mainly to reduce the blind spots in the car. When the car is not fully observed, it is easy to cause traffic accidents. The trainees need to make major changes in practice, not only to deal with The exam is more about the safety of driving on the road in the future. As long as the students pay attention to these points, the examination will not be completed! 1. According to the compaction principle, it can be divided into static action roller and vibratory roller. Static action roller (including static smooth wheel roller and tire roller) compacts the soil by the static pressure generated by the self weight and load of the roller. Vibratory roller relies on the combined action of high-frequency vibration and exciting force generated by the vibrating mechanism
4. According to its structural weight, it can be divided into light, small, medium, heavy and ultra heavy rollers.
The road roller, also known as the soil compactor, is a kind of equipment for road construction.Road rollers belong to the category of road equipment in construction machinery. They are widely used in filling and compacting operations of large-scale engineering projects such as high-grade highways, railways, airport runways, dams, and stadiums. They can roll sandy, semi-cohesive and cohesive soils, Subgrade stabilized soil and asphalt concrete pavement layer.With the gravity of the machine itself, the road roller is suitable for various compaction operations, so that the rolled layer can be permanently deformed and compacted.Road rollers are divided into two types: steel wheel type and tire type. Road Roller,Road Roller Machine,Road Compactor,Road Roller Compactor Shandong Vio Machinery co.,ltd. , https://www.shantui-xcmgparts.com
2. According to the number of rolling wheels, it can be divided into single wheel roller, double wheel roller, three wheel roller, etc.
3. Self propelled roller can be divided into mechanical transmission roller, mechanical hydraulic transmission roller and full hydraulic transmission roller according to its power transmission mode.