What kind of first-aid equipment for ordinary people is usually installed in crowded places in developed countries in the West?

Automatic defibrillators. Automatic defibrillator fast and effective, intelligent and easy to use, without the need for users to have a high level of ability to read the electrocardiogram, turn on the power, press the button, you can complete the automatic analysis of the electrocardiogram, defibrillation, non-medical personnel in the acceptance of four hours of study and practice, can be fully mastered. Automated defibrillation, commonly known as the Fool's Defibrillator, is a portable, easy-to-operate universal, skilled in use with a little training, designed for non-emergency personnel in the field of medical emergency equipment.