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Member for
3 ปี 3 เดือนAge: 14-17
Level: 8 - 10
Language: English
(en)
ไอดี: 1972541
30/03/2022
Country code: ZA
Country: South Africa
Main content: Rack amd Pinion and worm gears (1742687)
From worksheet author:
Study of Gears
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