梯級(jí)塌陷防護(hù)裝置 steor pallets sagging guard: 踏板塌陷保護(hù)裝置sagging: 沉降；下垂; 流掛，下垂; 彎曲; 中垂 自重烘彎 松垂 漆面流墜a sagging roof: 下陷的屋頂differential sagging: 差異沉陷作用moment; sagging: 垂下力矩下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
