一、前言遵照毛主席关于“独立自主,自力更生”、“走自己工业发展道路”的伟大教导,我省广大建筑工人和工程技术人员,破除迷信,解放思想,试制成功了混凝土空心砌块,并用这种砌块先后建造了住宅、医院、办公楼、仓库等建筑四万余平米。实践证 I. INTRODUCTION In compliance with Chairman Mao’s great teachings of “independent, self-reliant, and self-reliant” and “taking the path of industrial development in our own country,” the majority of construction workers and engineering technicians in our province have broken through superstitions, emancipated the mind, and successfully manufactured concrete hollow blocks, and used this The building block has successively constructed more than 40,000 square meters of houses, hospitals, office buildings, warehouses and other buildings. Practice certificate