资料采用秩和检验和等级相关分析的统计学处理方法。
Data were analyzed by rank sum test and Spearman correlation test.
航空发动机送修费用与送修等级紧密相关。
There exists close relation between maintenance cost and maintenance level of aircraft engine.
航空发动机送修费用与送修等级紧密相关。
It has close relation between maintenance cost and maintenance level of aircraft engine.
航空发动机送修费用与送修等级紧密相关。
It has close relation between maintenance cost and maintenance level of aircraft engine.
应用推荐