… blades, crossing frogs, point rods and other crossing pieces, sleepers (cross-ties), fish-plates, chairs, chair …
Explanatory notes
… blades, crossing frogs, point rods and other crossing pieces, sleepers (cross‑ties), fish‑plates, chairs, chair … consists of two long parallel bars connected by closely spaced transverse rods; the spaces between these rods are … serve to prevent deformation (or “creep”) of the track at certain points. (7) Other specialised rail anchors are …