Qhov ntev ntawm lub trench: 6 m
Thaj tsam ntawm lub trench: 3.6 square metres
qhov ntim ntawm lub trench: 3.6 cubic meters
Pab tau ntim: 2.88 cubic meters
ntev mus ntawm slopes: 0.72 cubic meters
Cov nqi
Tus nqi ntawm digging ib trench: 1800
Nqi tshem tawm cov av: 720
Tag nrho: 2520
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