Assertion: mm gauge railway | /r/CapableOf | produce a range of industrial railways
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text: Arthur Percival Heywood developed 15 in (381 mm) gauge estate railways in Britain and Decauville produced a range of industrial railways running on 500 mm (19 3⁄ 4 in) and 400 mm (15 3⁄ 4 in) tracks, most commonly in restricted environments such as underground mine railways, parks and farms, in France.