3D millimeter wave body security door3D millimeter wave human security door is an advanced security equipment, the following is a detailed introduction of 3D millimeter wave human security door: 一、Definition3D millimeter wave human security door is the use of millimeter wave technology for human sec

Handheld metal detectorThe handheld metal detector is a kind of metal detector, which is named because of the way it is used. The following is a detailed introduction to the handheld metal detector: 一、Working principleThe hand metal detector works on the principle of electromagnetic induction. When

National Day Celebration, Safety FirstNational Day is a day to celebrate the birth of the country and a grand festival for the participation of the whole nation. On this day, various celebrations are held across the country, and people step out of their homes to enjoy the joy of the festival. Howeve