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- double back pressure condenser 双背压凝汽器
- The road ahead was flooded so we had to double back. 前面的路已遭水淹，我们只好原路折回。
- The road ahead is flooded so we have to double back. 前面的路已遭水淹，我们只好原路折回。
- What is maximum acceptable back pressure? 如果是,给出可接受的最大背压?
- The gymnast had to do a double back flip. 这个体操运动员得做一个360度后空翻。
- He doubled back by another road and surprised us. 他从另一条路折了回来，吓了我们一跳。
- The fugitive doubled back to confound the pursuers. 逃亡者用曲折迂回的办法来迷惑追踪者
- Double back the edge before sewing. 在缝纫前把边对折起来。
- Had to double back to touch the missed base. 必须紧急转身回头触垒。
- Seating load and tightness is dependent on back pressure. 阀座密封负载和紧密性与反压力相关。
- This back pressure is no problem for the rupture disk. 如果压力放散系统的压力进入到爆破片中，对爆破片不会产生影响。
- If you double back the blanket,it will be more comfortable. 如果把毯子叠起来会更舒服。
- He started running towards the street but suddenly doubled back to his room. 他开始往街上跑，但突然又折回自己的房间。
- The teacher told Tom to double back the sheet and tear it in half. 老师告诉汤姆把床单撕成两半。
- Several different types of valves are in use. Some are back pressure valves. 有几种不同的阀在使用中,有些是反向压力阀。
- When you give a hand to others, you must get double back. 当你帮助别人的同时你将得到双重的回报。
- If you double back the blanket, it will be more comfortable. 如果把毯子叠起来会更舒服。
- The road ahead was foolded so we had to double back. 前面的路有水我们只好原路返回。
- He told me to double back the sheet of paper and tear it in half. 他叫我把纸对折起来撕成两半。
- The fox doubled back on its tracks. 狐狸突然转身循原路急逃。
