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- Sea-floor spreading
- Age 9-12
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level: 6
- English
คำแนะนำของผู้เขียน
sea-floor spreading and mid-ocean ridge
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คำแนะนำของผู้เขียน
sea-floor spreading and mid-ocean ridge
level: 6
sea-floor spreading and mid-ocean ridge
sea-floor spreading and mid-ocean ridge