日商岩井株式会社所属虎牌机械制造厂曾与我们就该厂制造的混凝土砌块成套设备及生产工艺进行了技术座谈。这是混凝土砌块专业第一次对外技术交流活动。现将有关情况整理介绍如下。 (一)概述日本建造房屋,过去多用木材。五十年代前后,随着工业的发展,其它建筑材 Nissho Iwai Co., Ltd.’s owned tiger brand machinery factory had a technical discussion with our company on the concrete block equipment and production process. This is the first time for professional technical exchange activities for concrete blocks. The relevant circumstances are summarized below. (i) An overview of Japan’s construction of houses, which used more wood in the past. Around the fifties, with the development of industry, other building materials