不拆线预试
Prenventive test without disconnecting the lead-wires
Protective test without clearing down-leads
定性预试验
Qualitative preliminary test
非定期停电预试
non-periodic power cut preventive test
化学成分预试
preliminary chemical analysis
客运预测
passenger traffic forecast
社区干预试验
Community intervention trail
试预报效果
Experiment forecast effect
系统预试
Systematic pretest
Preliminary systematic test
systematical test
预试
pretest
Preventive
preliminary test
preexamination
trial test
preventive test
trsting rabe of prediction
Preliminary examination
Pretesting