runnels 中文意思是什麼
runnels
解釋
朗內爾斯-
The rain ran in shallow runnels alongside the path
雨水流進路邊的小河溝里 -
The key technique of this project is the design and construction of four deep - lying long runnels. their length, diameter and maximum bury - depth are 18 km, llm, 2500 m
這一工程的關鍵技術是四條長達18公里、開挖洞徑11米、最大埋深2500米左右深埋長隧洞的設計和施工。
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