电影历史
Rocks and Minerals: How We Identify Them
1971美国13 分钟★ 0.0
Shows how common rocks and minerals can be identified by color, texture, hardness, streak and other standard procedures.
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电影历史
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Shows how common rocks and minerals can be identified by color, texture, hardness, streak and other standard procedures.
按热度发现近期被频繁查看的电影
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