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词汇 Stoneblowers
分类 英语词汇 英语翻译词典
释义

Stoneblowers

英语百科

Stoneblower

DR 80301 at Meldon Quarry, Dartmoor Railway
This is a photograph, at a distance, of the PBI'84 operating in its measurement phase.
This is a closeup photograph of the

A Stoneblower is a railway track Maintenance machine that automatically lifts and packs the sleepers with small grade ballast, which is blown under the sleepers to level the track. An alternative to the use of a Ballast tamper, the totally self-contained machine levels track without the use of a large gang of workmen.

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