Invidious
Irvan Irvan
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3:22

Aqua rejia metode dari batuan emas#Aqua rejia method from gold rock

Irvan Irvan

Shared 3 months ago

36 views

3:50

Tes uji gesek logam emas.#Metal friction test..gold..

Irvan Irvan

Shared 4 months ago

26 views

3:28

Koordinat

Irvan Irvan

Shared 7 months ago

9 views