目前世界上生产小型空心砌块的成型机主要有移动式(即下蛋机)和固定式的两大类.对它们的优缺点和适用条件众说纷纭,莫衷一是.从最近国际上两次大型的展销(览)会看,两者都有发展,并各具特色.1980年4月在西德慕尼黑举行了第19届国际结构和材料生产展销会(每四年举行一次),我国家建委设备材料局派员参加了.据各种资料和了 At present, there are two types of molding machines for producing small hollow blocks in the world, mobile (ie, egg-laying machines) and stationary. There are many opinions about their advantages, disadvantages, and applicable conditions. There are two major large-scale exhibitions in the world recently. (see)) See, both have developments and have their own characteristics. In April 1980, the 19th International Structure and Material Production Fair (held every four years) was held in Munich, West Germany. The Equipment and Materials Bureau of the National Construction Commission of China Sent personnel to participate in. According to various sources and