日韩在线欧美精品第二页观看_www在线免费观看视频_国产69精品剧情视频_免费成人直播_日本亚洲免费在线电影_月亮影视大全_五月激激激综合网色播胖胖_国产成人精品久久56_总裁与秘书啪啪日常H_被翁持续侵犯的中文字幕

The Plunger Sampling Pipettes acc. to Hensen are simple but precise tools to retrieve small plankton sub-samples. The volume of the sub-samples is defined by the accurately machined geometry of the piston, avoiding any volume errors. Each pipette is delivered completely with dilution bottle and stopper.