20 The railway track is the structure consisting of a) rails, fasteners, sleepers, ballast bed or concrete slab b) rails, fasteners, sleepers, ballast bed and concrete slab c) rails, fasteners, sleepers, ballast bed d) rails, fasteners, sleepers, concrete slab
20 The railway track is the structure consisting of a) rails, fasteners, sleepers, ballast bed or concrete slab b) rails, fasteners, sleepers, ballast bed and concrete slab c) rails, fasteners, sleepers, ballast bed d) rails, fasteners, sleepers, concrete slab
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Transcribed Image Text:20 The railway track is the structure consisting of
a) rails, fasteners, sleepers, ballast bed or concrete slab
b) rails, fasteners, sleepers, ballast bed and concrete slab
C) rails, fasteners, sleepers, ballast bed
d) rails, fasteners, sleepers, concrete slab
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