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Lego technic crawler crane
Function:
1. Movement right track (1 L motor)
2. Movement left track (1 L motor)
3.Rotating tower (1 M motor)
4. Lowering / lifting boom (1 L motor)
5. Lowering / lifting hook (1 L motor)
6. Switching function between 2 L motors (1 motor M)

CrawlerCrane.lxf