近日看到防空警报统一试呜的消息,让我想起了三四十年前挖防空洞的往事。1969年6月,国务院成立了全国人民防空领导小组,接着中央军委办事组下达指令,要求各省、市、自治区成立人民防空领导小组。从那时开始,全国把大量的人力、物力、财力投入到人防工程,挖防空洞、修地道、储备粮食和布匹等,掀起了全民备战运动。许多单位都抽调职工投入挖掘防空洞工程。最初全靠人力操作,在选中的地点用锄头挖开2×2公尺的洞口,继续深挖到离地面6公尺时,开始转弯向纵深挖掘,坑道顶部修成拱形,最初挖出的泥土靠人力用竹筐往外传送,当到达坑口时,用滑轮吊绳向上传送,出口处由人力 Recently I saw news of a unified trial of air defense warnings that reminds me of the past when I was able to dig through air defense holes three or four decades ago. In June 1969, the State Council established a leading group for people’s air defense throughout the country. Subsequently, the Central Military Commission’s handling unit issued a directive requiring all provinces, municipalities and autonomous regions to set up a leading group for civil air defense. Since then, the whole country has put a large amount of manpower, material and financial resources into civil air defense projects, digging bomb shelters, building roads, storing food and cloth, and setting off a national preparedness campaign. Many units have deployed workers to invest in air-raid shelters. Initially relies entirely on human operation, digging 2 × 2 meters hole with a hoe at the selected location, continue to dig deep to 6 meters away from the ground, began to turn to dig in depth, the top of the tunnel arch, the first dug of soil Rely on the human use of bamboo baskets to send out, when the Hang Hau arrived, with the pulley sling up transmission, the exit by manpower