词汇	sleeper pass
释义	sleeper pass 钢枕孔型
随便看	covered with growing timber Covered with knots or knobs Covered with knots or knobs; gnarled Covered with mealy dust or powder covered with mud Covered with or containing humps Covered with or having leaves Covered with palm trees Covered with pustules covered with reinforced concrete Covered with short hairs or soft down Covered with soil shallowly Covered with undergrowth Covered with warts or wartlike projections covered works covered worsted covered writer covered writing Covered Yacht cover-excavation method cover excavation reverse method cover expenses cover expenses on insurance cover factor cover fastening