2020国内精品久久久久精品,免费A级毛片无码免费视频,女人和拘做受全程看,亚洲第一区欧美国产不卡综合

The KC-Denmarks box corer's series is a marine geological sampling tool for soft sediment in lakes or oceans. It is deployed from a research vessel with a deep sea wire and suitable for any water depth. It is designed for a minimum of disturbance of the sediment surface by bow wave effects which is important for quantitative investigations of the benthos micro- to macrofauna, geochemical processes, sampling of bottom water or sedimentology.The KC box corer frame is manufactured from 100 x 100 x 6 mm square AISI 316 steel tube and electro polished.