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单词
Protocycloceras
释义
Protocycloceras
网络
前环角石;原圆环角石;奥陶纪的前环角石
网络释义
1.
前环角石
头足类动物化石,
前环角石
(
Protocycloceras
),壳直或微弯。横切面圆至椭圆形。
www.findart.com.cn
2.
原圆环角石
地质学专业英语词汇(58) ... 原油 crude oil
原圆环角石
Protocycloceras
原藻砂岩 Eophyton sandstone ...
www.for68.com
3.
奥陶纪的前环角石
...延至志留纪。化石有产于中国北方上寒武统的短棒角石(Plectronoceras)、
奥陶纪的前环角石
(
Protocycloceras
)、梯级角 …
baike.baidu.com
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更新时间:2025/8/11 13:03:09