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LEGO Technic Heavy-Duty Excavator 42121 Toy Building Kit; A Cool Birthday or Anytime Gift for Kids Who Enjoy Construction Toys; The 2-in-1 Design Gives Hours More Building Fun, New 2021 (569 Pieces) :
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Turning lego set 42121 into a crawler crane, I'm waiting for more parts, but this is what I have so far! : r/legotechnic
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MOD] 42121 Compact Excavator - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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42121 Hydraulic Excavator - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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