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加拿大太平洋地区林业研究所所长,原环境部林务局森林保护处处长D·R麦克唐纳先生于1980年8月8日至16日到我国进行了访问。
Mr. R. McDonald, Director of the Canadian Pacific Research Institute for Forestry and Director of the Department of Forest Protection of the former Ministry of Environment and Forestry, paid a visit to our country from August 8 to August 1980.