Trial 4 test is conducted by sampling from aeration pit of the school farm at fixed time on daily basis.The samples collected are taken to measure the conductivities and pH value.
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美
- 试验四利用学校畜牧场之连续批式曝气池进行采样,每日固定时间采样一次,采样后测定导电度、酸碱度等值。