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PEG-treating in conservating a dongsonian dugout log coffin of 2300 years old

During excavation 2004 in Du Sang rock-shelter ( Kim Boi, Hoa Binh)

The dongsonian bronze drum excavated in burial field Dong Xa (Kim Dong, Hung Yen, Vietnam) in detail.

Bach Dang poles discovery

The Pham Huy Thong Museum with it's laboratories in Yen Hung (Quang Ninh)
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