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一、概述一九七五年——七七年间我国先后两批从国外引进 B20型九节式机械冷藏车组三十二列(货物车262辆,乘务发电车38辆,共300辆)。该车组配属广州机械保温车辆段使用。B20型机械冷藏车的端墙上方各装有一台 FAL056/2型制冷加热设备,以用于运送在夏季日平均外气温+36℃,冬季最低温度-45℃的环境下,要求货间温度保持+14°～-24℃的易腐货物,以及用于冷却没有予冷的水果和蔬菜。经六年来的运行考核,
I. Overview During the period from 1975 to 1977, China has successively imported 32 sets of Type B20 nine-mechanical refrigerated truck units from abroad (262 goods vehicles and 38 power generating trains for a total of 300 vehicles). The car is equipped with Guangzhou machinery insulation car segment use. B20-type mechanical refrigerator car above the end wall are equipped with a FAL056 / 2-type cooling and heating equipment for transportation in the summer average outdoor temperature of +36 ℃, the lowest temperature in winter -45 ℃ environment, the required temperature of the cargo hold Perishable goods at + 14 ° to -24 ° C and for cooling fruits and vegetables that are not chilled. After six years of operational assessment,