From two thousand feet he tried again, rolling into his dive, beak straight down, wings full out and stable from the moment he passed fifty miles per hour.
他从两千英尺高空再试一次。时速一达到五十英里，他就翻转身俯冲下来，嘴朝下，双翅完全展开，一动不动。
2
We manufacture hot rolling steel pipes, straight seam pipes and seamless steel pipes.
我公司生产热轧钢管，直缝钢管和无缝钢管。
3
At present stripping rib rollingstraight thread is the most advanced technology of reinforced connections.