Add a correctly positioned wrist arm (-+200mm) and replace the prefabricated contact network with a 200mm offset wrist arm

Fix detail issues

Detail modification

This update includes automatic suction and connection functions for the hand pulled contact network, which can simplify and accelerate the installation of the contact network

Added pre-set contact network components for the main line, facilitating the installation of contact networks on long main lines

Standardize the names of Cantilever arms. Added Cantilever with 0 offset.

Added 400km of track and tunnel track with overhead contact system.