Shafts are dug to the required level along the planned route of the qanat, every 300 m or so […].
Source: wiktionary
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3 total sentences available.
Shafts are dug to the required level along the planned route of the qanat, every 300 m or so […].
Source: wiktionary
Elsewhere over large areas of the plateau and the foothill regions, the qanat irrigation cultures were weakened considerably.
Source: wiktionary
Its gardens are watered by rivers that invariably flow underground, like the subterranean qanat'''s developed by the Persians.
Source: wiktionary