sanitary protective zone 卫生防护地带
safe and health protective zone 安全卫生防护距离
Conditions of Natural Protective Zone 自然保护区情况
protective equipment zone 防护设备区
protective sanitary zone 卫生防护区
zone of protective gummosis 流胶保护圈
·2,447,543篇论文数据，部分数据来源于NoteExpress
Geopark is the key protective zone of the geological vestiges and the ecological environment, and also, is the base of the scientific research and popularization of geological knowledge.
地质公园是地质遗迹景观和生态环境的重点保护区，是地质科学研究与普及的基地。
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