短語詞組短語sand sediment trap 沉沙槽;沉沙井sand sediment trap cleaning 窨井清掏shoestring -sand trap 鞋帶狀砂巖圈閉;鞋帶狀砂巖體圈閉streamer sand trap 飄袋式捕沙器desilting sand trap 隔沙池;隔沙井;沉沙池Sand trap rakes 障礙沙坑用耙子sand trap breakwater 擋沙防波堤conical sand trap 錐形除砂器luvial cone sand trap 沖積錐沙體圈閉 返回 sand trap