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白河林业局汽运处养路段担负着四百多公里的运材公路养护任务,每年必备一台专用的回沙器,在公路上轮回作业,以保证路况质量的良好状态。几年来,养路段一直采用钢板制做或用废履带板及一定数量的圆钢制做回沙器,每套大约需2500元,一年需要两套钢制回沙器,共计5000多元。鉴于钢材昂贵,货源困难,该处采用方形大青石取代钢材,制做了新型回沙器,并于1989年3月29日由局主管部门组织通过技术鉴定。
Baihe Forestry Bureau’s vehicular maintenance section is responsible for more than 400 kilometers of transportation and road maintenance tasks. Every year, a dedicated sand returner is required to operate on highways to ensure the quality of road conditions. Over the past few years, the road maintenance section has been using steel plate or waste track plate and a certain number of round steel sand returners, each set about 2,500 yuan, a year requires two sets of steel sand returners, a total of more than 5,000 yuan. In view of the fact that steel products are expensive and difficult to supply, the use of square dolites in place of steel products led to the creation of a new type of sand returner. On March 29, 1989, the competent authority of the Bureau organized a technical appraisal.