| 1. | Effective optical path length
光通道有效长度 |
| 2. | Effective length factor of columns in sway and semi - rigid composite frames
有侧移半刚性连接组合框架柱的有效长度系数 |
| 3. | Chassis frame useful length
车架有效长度 |
| 4. | Maximum duct length
管子加工的有效长度 |
| 5. | Effective length of nail
钉有效长度56 |
| 6. | Effective length of weld
焊缝有效长度 |
| 7. | Clear effective length
净有效长度 |
| 8. | It is an island - typed platform with a virtual length of 207 . 15m and a covering area of 17500m2
站台有效长度207 . 15米，为岛式站台，总建筑面积为17500平方米。 |
| 9. | This article presents a mathematical calculation model of kinematic parameters for the unusual shape beam pumping unit by analyzing its geometry relationship and kinematic characteristics
异形游梁式抽油机的游梁后臂有效长度随曲柄转角而变化，故无法利用常规游梁式抽油机的解析方法来计算其运动参数。 |
| 10. | Both of forward and back bearings have been integrated into one box to make full use of the length of base frame that the motor formerly mounted on , and short the shaft extended lengths in both end with the strengthening connection between bearing housing and screw thread of base
将前后两支承设计为一个整体轴承座，充分利用原电动机安装底座的有效长度，最大限度地缩短了轴的悬伸量，提高了轴承座与底座的螺纹联接强度。 |
