Comparison method and vidco-tape recorders were used in case study for recording thc operation performances of two group operators. The time span was 7 months, from September 10 March. The performance of operations in...Comparison method and vidco-tape recorders were used in case study for recording thc operation performances of two group operators. The time span was 7 months, from September 10 March. The performance of operations in September was taken as references. The results of test survey and data analysis showed that the tree-felling operation efficiency was influenced by cold weather, properly decreased 18.5% in average.展开更多
文摘Comparison method and vidco-tape recorders were used in case study for recording thc operation performances of two group operators. The time span was 7 months, from September 10 March. The performance of operations in September was taken as references. The results of test survey and data analysis showed that the tree-felling operation efficiency was influenced by cold weather, properly decreased 18.5% in average.
