同根派生 box beams相關(guān)詞英漢例句The successful alternative was the cast-in-place segmental prestressed concrete box girder.最後採(cǎi)用的方案是分段現(xiàn)澆的預(yù)應(yīng)力混凝土箱形梁。It is provided with a telescopic bracket.The box beam at the external side of the telescopic part of the bracket is inserted into the square hole in the main beam.其中,拖架具有可伸縮功能,是通過(guò)可伸縮部分外側(cè)的箱形梁插入貨臺(tái)主梁的方孔中,選擇箱形梁上孔的位置來(lái)實(shí)現(xiàn)的。box beams更多例句