Around the 6th century BC, people used rocks puzzle 伊達(dá)拉里亞 channel system, the flood caused by heavy rains discharged from the city of Rome. Channel system in a largest cross-section of 3.3 m × 4 m, from the Roman town square leading to the Tiber River.

Around 6th century BC, Yida laria who first used the rock drainage system caused by torrential rains, the city of Rome from torrent emitted. The largest of the channel system for Article 3.3 M X 4 M transects, from ancient Roman city plaza to Tiber.

B.C.E. about 6 centuries, Iraq reaches the lary Asia person to use the channel system which the rock builds, creates the rainstorm the mighty current to discharge from Luo Macheng.In the channel system a biggest section is 3.3 meters ×4 rice, leads to Tiber river from the ancient Rome city square.

BC 6th century or so, yidalaliya people using rock masonry canal system, heavy rain caused flood discharge from Rome. Channel system in one of the biggest section is 3.3 m x m, from the ancient Roman city square leading to the River Tiber.

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