The bottle should not be allowed to touch the bottom in the sampling to avoid stirring up the sediment. 为了避免在采样过程中搅起沉积物质,瓶子不得接触水底。
ASM can modify sampling intervals in time according to the variations of signal frequency in every signal cycle and finish a sampling process in a signal cycle. 近似同步法根据信号频率的变化实时地调整采样间隔,并且只需一个信号周期就可完成一次采样过程。
We consider that equal-ratio sampling method is suitable for the successive and unsteady emitting status of waste water. 并认为等比例采样法是连续不稳定排放方式比较适合的采样方法。
The distribution of particle concentration in the cyclone tube was measured by isokinetic sampling method. 采用等动采样方法对旋风管内的颗粒浓度分布进行了系统测量。