Telltale deposits of debris suggest that sediments were washed downhill by occasional liquid flows. The bottle should not be allowed to touch the bottom in the sampling to avoid stirring up the sediment. 证据是一些碎片的沉积物被偶然流过的水冲到了坡底。为了避免在采样过程中搅起沉积物质,瓶子不得接触水底。
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。
A kind of horizontal straight-neck, double-bottle mouth portable water samplers was designed. It was simple in structure and operation, and was easy to clean and to continuously connect sampling staff. 设计了一种具有结构简便、操作方便、易于清洗和采样杆可续接的直颈双口卧式便携水样采集器。