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本交系苏联专家利比娜同志1954年在我国作的报告,最近有许多同志新参加煤田物探工作,特发表以供学习。
This diplomatic note is a report made by our Libyan expert Libina in our country in 1954. Recently, many comrades have newly joined the work of geophysical prospecting in coal fields and have specially published them for study.