Guiyang Yuqiang High School recently carried out security screenings for students entering the school gate. The examination of students entering the school was to prevent students from entering the school with mobile phones and tools. Before entering the school, on the entrance side of the school gate, there were four or five students who looked like they were wearing red armbands on the arms of the students. Two of them held hand-held metal detectors similar to those used by airport security personnel to examine the incoming students one by one. From time to time, they also put their hands directly into the student's underwear pocket or school bag for inspection.

In response, Ren Kang, the deputy head of Yukang Secondary School, explained to the reporter that the children of the floating population of the school are mostly children and the students are more complicated. The “search” is mainly to strengthen the internal management of the school. The purpose is to prevent the control of dangerous goods such as cutting tools from entering the campus. Harm to ensure campus safety. The prohibition of taking mobile phones is to allow students to concentrate more on learning.

“The starting point is to provide students with a good and civilized learning environment. At the beginning of the school year, the school and every parent signed an agreement including the prohibition of the use of cell phones, controlled knives, cigarettes, alcohol, etc., but it did not work. There is still a pile of confiscated mobile phones in our office,” said Ren Kang, the vice president, pointing to the phone on the ground.

Gate Valves

Gate Valves are called "full-flow" valves; there's a direct unobstructed path for flow right through the middle of the valve. A wedge-shaped brass gate is lowered into a machined slot to close the valve. They should either be completely open or completely closed. Water flowing through a partially open gate valve wears away the metal and causes the valve to fail over time.

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