The annual net profit attributable to shareholders of the listed company was 3.248 billion yuan to 3.596 billion yuan, an increase of 2.088 billion yuan to 2.436 billion yuan, 180% to 210% year-on-year.

As early as in ancient times, people used the hoof feet of herds to trample, rub and tamper the soil to treat the foundations of houses, compact the dams and river banks, and before the mid-19th century, the road works in the West were made of gravel.

Unmanned aerial vehicle is abbreviated as "UAV" in English. Since the birth of the aircraft in the early 20th century, people at that time have proposed the idea of ??unmanned aircraft due to the safety of flying the aircraft. It was not until the 1930s that the British Ferrer Company transformed a "Queen" dual fixed-wing aircraft into an unmanned target drone, which opened the prelude to the entry of unmanned aerial vehicles into aviation history.

The backhoe loader has the advantages of fast operation speed, high efficiency, good maneuverability and easy operation, so it has become one of the main types of earthwork construction in engineering construction; generally speaking, after the new backhoe loader leaves the factory, the general regulations have 20- The running-in period (or run-in period) of about 50 hours is stipulated according to the technical characteristics of the loader in the early stage of use. The following will introduce the precautions of the backhoe loader during the running-in period.

As a kind of efficient and advanced agricultural equipment, Agricultural Spraying Uav have developed rapidly in China in recent years. At present, there are more and more domestic companies engaged in the research and development and production of plant protection drones, and they are showing a rapid growth trend. There are nearly 400 UAV manufacturers in China, and there are more than 10 in our city.

First test whether the control mechanisms of the roller are flexible, and whether the forward and reverse driving, steering, accelerator and brake actions are normal.