上下通气
上下通气上下通气[shàng xià tōng qì]1.■communication between higher and lower levels; full communication between the higher and lower levels
热门单词
- 一次枝线 linear branch;
- 一致度量 uniform metric;
- 一通文书
- 丁苯
- 万向接头传动装置 cardan gear;
- 万向节十字头 cross connecting piece; universal joint cross;
- 万向节轭 universal-joint yoke;
- 万端
- 万能台式铣床 universal bench mill;
- 万顷碧波
- 三倍体 triploid;
- 三次对称轴 axis of trigonal symmetry;
- 三次曲线 cubic curve; cubic;
- 三氯化硼 boron chloride; {无化} boron trichloride;
- 三班
- 三色组 {讯} triad
- 三裂星云 Trifid Nebula;
- 三角剖分问题 {数} triangulation problem;
- 三角-星形接线 delta-star connection;
- 三重调谐腔体 triple-tuned cavity;
- 上交叉点
