progressive speed trial的意思|示意

递增速率试验 ... official speed trial 正式试航 progressive speed trial 递增速率试验 full speed trial 全速试车全速试航 ; 全速试航 ...

逐级加速试航 ... 经济航速试航 economy trial 逐级加速试航 progressive speed trial; progressive trials; progressivetrials 全功率试车全速试航 full power trial ...