China Naming Network - Eight-character Q&A - What is the application quota of culverts in Wang Tong?

What is the application quota of culverts in Wang Tong?

4-1-1-manual excavation of foundation pit earthwork (excavation of dry part within 3m of foundation pit depth) \ x0d \ 4-1-5-1gravel (sand) of foundation cushion \ x0d.

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