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No. They were roughly done in three periods, Paleolithic Period;
大概是分成3个不同时期完成的，即旧石器时期；
youdao
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The microlithic tool tradition appeared in the late paleolithic period.
到旧石器时代晚期，同时存在细石器技术传统的产品。
youdao
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The microlithic tool tradition appeared in the late paleolithic period.
到旧石器时代晚期，同时存在细石器技术传统的产品。
youdao