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Pre-chellean

1、前息尔期

Osborn）氏《旧石器时代之人类》一书上所列少去前息尔期（Pre-Chellean）一段；上旧石器时代中尚有四个小段落，也是以器物发见之地点为名的，比奥氏书上所列少去泰尔期。

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