Hoerner wing tips provide the largest effectivespan for a given geometric span or a given wing weight.
霍纳翼尖翼提供给定的重量最大有效跨度为给定的几何大跨度或。
2
The result of the practical test showed that the technique was a effective way to solve the problems of high stress road and large span intersection supporting.
工程实践表明，该技术是解决深井高应力软岩巷道、大断面交岔点等支护难题的有效途径。
3
The actual time span for the oldest effective source beds, both oil and gas, actually may be much greater.