我们对食品冷藏库保温门作了调查研究,与工人同志们一起,针对一些容易产生的问题提出改进方案。经过一年来反复试制、试验,初步取得了一些经验。目前,新的保温门正在试用,尚须进一步改进,现将设计情况分述于后: We conducted investigations and studies on the insulation door of food cold storage, together with the workers’ comrades, proposed improvements for some of the easily-produced problems. After repeated trial production and testing over the past year, some preliminary experiences have been obtained. At present, new insulation doors are being tested and further improvement is needed. The design is now described as follows: