1) concentric cylinder
同心圆柱
1.
Its graphics is described visually by considering the intersection of the surface with a plane or a concentric cylinder,by which two of its characteristics are pointed out: sine and ruled.
首次命名二元函数z=xy/x2+y2为正弦直纹曲面,用同心圆柱面截痕法和平面截痕法对它的图形进行了形象的描述,揭示了它的正弦和直纹这两个特征,研究了正弦直纹曲面的间断点和偏导数等数学性质,介绍了动态演示该曲面的课件。
2) concentric cylinders
同心圆柱体
3) homocentric cylindrical inclusions
同心圆柱夹杂
4) two concentric rotating cylinders
两个同心旋转圆柱
1.
The shape problem of interface surface of bicomponent flows between two concentric rotating cylinders is investigated.
研究两个同心旋转圆柱之间的两种流体的交界面几何形状问题。
6) eccentric circular cylinders
偏心圆柱
1.
This paper studies the steady streaming flow of low Reynolds number between two eccentric circular cylinders.
本文研究低雷诺数情况下偏心圆柱间定常Streaming流动问题,其中内柱以速度U(x)cosωt在静止不可压粘性流体中作小振幅直线简谐振动,外柱则固定不动。
补充资料：55°圆柱管螺纹的型式和尺寸
| 螺纹代号 | 基本尺寸 | 大径 mm d=D | 螺距 mm p | 每英寸牙数 tpi | 中径 mm d2=D2 | 小径 外螺纹 d3 | 牙型高度 H1 | 底孔尺寸 mm | |
| G 1/8 | 1/8＂ | 9.728 | 0.907 | 28 | 9.147 | 8.566 | 0.581 | 8.7 | |
| G 1/4 | 1/4＂ | 13.157 | 1.337 | 19 | 12.301 | 11.445 | 0.856 | 11.6 | |
| G 3/8 | 3/8＂ | 16.662 | 1.337 | 19 | 15.806 | 14.95 | 0.856 | 15 | |
| G 1/2 | 1/2＂ | 20.955 | 1.814 | 14 | 19.793 | 18.631 | 1.162 | 19 | |
| G 5/8 | 5/8＂ | 22.911 | 1.814 | 14 | 21.749 | 20.587 | 1.162 | 20.75 | |
| G 3/4 | 3/4＂ | 26.441 | 1.814 | 14 | 25.279 | 24.117 | 1.162 | 24.5 | |
| G 7/8 | 7/8＂ | 30.201 | 1.814 | 14 | 29.039 | 27.877 | 1.162 | 28 | |
| G 1 | 1＂ | 33.249 | 2.309 | 11 | 31.77 | 30.291 | 1.479 | 30.5 | |
| G 1 1/8 | 1 1/8＂ | 37.897 | 2.309 | 11 | 36.418 | 34.939 | 1.479 | 35 | |
| G 1 1/4 | 1 1/4＂ | 41.91 | 2.309 | 11 | 40.431 | 38.952 | 1.479 | 39.5 | |
| G 1 3/8 | 1 3/8＂ | 44.323 | 2.309 | 11 | 42.844 | 41.365 | 1.479 | 41.5 | |
| G 1 1/2 | 1 1/2＂ | 47.803 | 2.309 | 11 | 46.324 | 44.845 | 1.479 | 45 | |
| G 1 3/4 | 1 3/4＂ | 53.746 | 2.309 | 11 | 52.267 | 50.788 | 1.479 | 51 | |
| G 2 | 2＂ | 59.614 | 2.309 | 11 | 58.135 | 56.656 | 1.479 | 57 | |
| G 2 1/4 | 2 1/4＂ | 65.71 | 2.309 | 11 | 64.231 | 62.752 | 1.479 | 63 | |
| G 2 1/2 | 2 1/2＂ | 75.184 | 2.309 | 11 | 73.705 | 72.226 | 1.479 | 72.5 | |
| G 2 3/4 | 2 3/4＂ | 81.534 | 2.309 | 11 | 80.055 | 78.576 | 1.479 | 79 | |
| G 3 | 3＂ | 87.884 | 2.309 | 11 | 86.405 | 84.926 | 1.479 | 85.5 | |
| G 3 1/4 | 3 1/4＂ | 93.98 | 2.309 | 11 | 92.501 | 91.022 | 1.479 | 91 | |
| G 3 1/2 | 3 1/2＂ | 100.33 | 2.309 | 11 | 98.351 | 97.372 | 1.479 | 97.75 | |
| G 3 3/4 | 3 3/4＂ | 106.68 | 2.309 | 11 | 105.201 | 103.722 | 1.479 | 104 | |
| G 4 | 4＂ | 113.03 | 2.309 | 11 | 111.55 | 110.072 | 1.479 | 110.5 | |
| G 4 1/2 | 4 1/2＂ | 125.73 | 2.309 | 11 | 124.251 | 122.772 | 1.479 | 123 | |
| G 5 | 5＂ | 138.43 | 2.309 | 11 | 136.951 | 135.472 | 1.479 | 136 | |
| G 5 1/2 | 5 1/2＂ | 151.13 | 2.309 | 11 | 149.651 | 148.172 | 1.479 | 148.5 | |
| G 6 | 6＂ | 163.83 | 2.309 | 11 | 162.351 | 160.872 | 1.479 | 161.5 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条