同学们,今天我们继续请国家文物局水下文化遗产保护中心的叔叔为大家讲一讲水下考古的发掘工作。同学们,上期我们讲到了发掘工作中抽沙这一环节,那么,清除掉泥沙之后,我们要进行哪些工作呢?提取文物泥沙被抽掉之后,大量文物露出了真容。有些直接由考古队员用网兜带出水面,也有些文物较重,需要使用机械吊臂、吊篮或者浮力袋来提取。浮力袋就像是一个气球,考古队员在水下将 Students, today we continue to ask the uncle of the Underwater Cultural Heritage Protection Center of the State Administration of Cultural Heritage to tell you about the excavation of underwater archeology. Students, the last time we talked about the work of pumping sand in this part of the work, then, clear out the sediment, what we want to carry out? Extraction of sediment was removed, a large number of cultural relics exposed the real capacity. Some directly by the archaeological team with a net bag out of the water, but also some heavy artifacts, the need to use the mechanical boom, basket or buoyancy bag to extract. Buoyancy bag is like a balloon, the archaeological team will be underwater