首页>
外国专利>
Method for forming flanges, especially knees (elbows) of chimney pipes, a set of devices for forming the flanges, especially knees (elbows) of chimney pipes and the flue pipe knee (elbow)
Method for forming flanges, especially knees (elbows) of chimney pipes, a set of devices for forming the flanges, especially knees (elbows) of chimney pipes and the flue pipe knee (elbow)
