The main products of shandong electric mechanical science and technology ltd., located in the xian view district of taian city, shandong province, are: wind doors for mines, wind doors for wind control, two-way air-activated, anti-wind doors for mines, wind doors for control, wind doors for wind doors, wind doors for mechanical locks, wind doors for air, air-capable locks, bmb shelter rooms for blast doors, closed doors, mmb waterproof doors, belts for wind doors。