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Lego 42121 - C model Bulldozer - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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42121 - Heavy-Duty Excavator - Building Instructions : Free Download, Borrow, and Streaming : Internet Archive
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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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REVIEW] 42121 Technic Heavy Duty Excavator - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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