Do they charge carriage by weight?

他们是按重量收取运费吗？

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Do they charge carriage by bulk?

他们是否按体积计算运费?。

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You will be required to pay a charge for the carriage of Baggage in excess of the free Baggage allowance. These rates are available from us upon request.

当您的行李重量超过免费行李额时，您需为超过部分付费。有关逾重行李的费率，可向我们查询。

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He was in charge of First Great Western's 1830 Swansea to London Paddington service, an eight-carriage train which was carrying hundreds of fans after the Second Division play-offs between Brentford and Stoke City.

BBC: Judgement reserved on train man's appeal