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

Folsom's Plankton Sample Divider provides a fast and easy method to divide large plankton samples into an amount suitable for examination. This instrument divides samples in halves. Simply repeat the operation until the desired amount is left. The transparent plastic drum of the divider is suitable for samples up to 100 ml. The base is provided with a water level and two levelling screws for easy horizontal alignment.