
A9 75 Precast parabolic canal, Pakistan
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A9 74 Parabolic segmental lining along a rough boundary, India
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A9 73 Vibrating plate compaction, India
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A9 72 Half-round segments, India
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A9 71 Pucca Nuccas in a rectangular watercourse, Pakistan
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A9 70 Rectangular brick wartercourse, Paksitan
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A9 69 Placing buried bitumen lining, Sri Lanka
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A9 68 Stone slab lining, India
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A9 67 Stone packing lining, India
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A9 66 An unlined canal,- Abazai Branch, Pakistan
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A9 65 Asbestos cement channel, Brazil
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A9 64 A circular timber flume, Montana
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