rail track component

鉄道工学
Narrower terms (3)：

track panel (軌きょう)
About track panel
- Search "track panel"
- Detailed information
ballast (道床)
About ballast
- Search "ballast"
- Detailed information
joint bar (継目板)
About joint bar
- Search "joint bar"
- Detailed information

Thsaurus map：

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