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
社区干预试验
Community intervention trail
试预报效果
Experiment forecast effect
系统预试
systematical test
Systematic pretest
Preliminary systematic test