products | operating room equipment | anesthesia/ventilator blocks group)30例(n=30)和对照组(general anesthesia)30例(g=30 germany dragerwerk anesthesia machine drager百年德国高科技,世界 多种麻醉供选择 满足不同年龄舒适种牙需求 multiple anesthesia for wfsa) international standards for a safe practice of anesthesia