手把电焊作业的防毒防尘措施,通常以局部抽出式机械通风为主。我局广大工人、技术人员,在长期实践中,研制了多种有效的通风排烟形式,兹选齐齐哈尔地区三种手把电焊侧吸罩介绍如下: 三种侧吸罩的形式、结构及特点一、多台位集中固定式侧吸罩 Hand-held anti-dust and dust prevention measures for electric welding operations are usually based on partially-extracted mechanical ventilation. In the long-term practice, our bureau workers and technicians have developed a variety of effective forms of ventilation and smoke exhaustion. We have selected three kinds of welding side suction hoods in the Qiqihar region as follows: The form, structure and characteristics of the three side suction hoods First, more than one centralized fixed side suction hood