College students developed the first "ship ballast water filtration system" in China

Recently, the first "ship ballast water filtration system" in China was successfully developed by students of Harbin Engineering University. At present, there are only 10 similar devices in the world. According to reports, the problem of carrying foreign species in ship's ballast water has become a worldwide problem. At least 7,000 species of the world are sailing to other places with the ballast water of the ship every day. The device can kill 90% of the microorganisms, and the treatment cost is only 0.037 yuan / ton.

Excavator Grading Beam

An excavator grading beam is a specialized attachment that can be fitted to an excavator. It is designed to help with grading, leveling, and excavating tasks. The grading beam is typically made of high-strength steel and is equipped with a series of teeth or blades that can be adjusted to different angles and depths.

The grading beam is attached to the excavator's arm, and the operator can use the machine's hydraulic controls to adjust the angle and depth of the teeth or blades. This allows the operator to precisely control the amount of material being excavated or leveled.

Excavator grading beams are commonly used in construction and landscaping projects, where they can be used to prepare building sites, level ground, and excavate trenches. They are also used in agricultural applications, such as land leveling and drainage work.

Overall, the excavator grading beam is a versatile and efficient tool that can help save time and effort on a range of excavation and grading tasks.

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