在高度自动化的生产现场如何检测高密度pcb一直是研究人员的难题。
It is always a challenge to testing high density PCB for researchers in the high automatic manufacture field.
将土样送试验室做击实试验，确定其最优含水率和现场控制干密度。
Send soil samples to lab for compaction test so as to determine the most reasonable water content ratio to enable on-site control of dry density.
用粉迹法测定现场鼠密度，计算校正灭鼠率。
And using the powder trace method to determine the field rat density and calculate the deratization effect.
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