tunnel boring machine 3d model

Industrial full-size tunnel boring machine (TBM), shield machine, ultra high precision mechanical model, complete internal and external structure details, cutter head with alloy cutter teeth, main bearing, segmented shield shell, pipe erector, conveyor belt system, cab and hydraulic pipeline details, engineering machinery realistic proportion, clean mesh, manifold closed, no floating geometry, printable 3D model, wall thickness suitable for FDM printing, no overhang that cannot be printed, scale reduced version for Bambu Lab A1 mini