boulder fence 中文意思是什麼
boulder fence
解釋
防石欄-
Landslide hazard mitigation works including earthworks, installation of soil nail, concrete check dam and flexible boulder fence, drainage works and maintenance access road works
山坡災害防護工程,包括土木工事、裝設泥釘、擋土堤和柔性防石欄、排水工程和維修通道工程。
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