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Civil Engineering Project Management (4th Edition)

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Plate 9a. A Mastenbroek 17/17 trenching machine with variable-offset heavy-duty<br />

cutting chain for trenches up to 0.6 m wide by 1.8 m depth. Larger machines are made.<br />

J. Mastenbroek & Co. Ltd, Boston, UK<br />

Plate 9b. A properly supported trench

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