The third group were prepared using the stainless steel hand K-files with the step-down technique(SS group).

不锈钢K锉组（SS）采用常规手用不锈钢K锉、逐步后退法预备根管。

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Conclusion it is better apical sealing ability in root canals prepared by crown-down technique than step-back technique.

结论短期内冠根向预备技术比逐步后退技术成形的根管更有利于根管充填后根尖孔的密封。

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For purposes of covering this instant messaging technique in an article format, we scaled down the awareness version that our company uses.

为了以文章格式涵盖此即时消息传递技术，我们缩小了公司使用的感知版本。

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The co-pilot contacted the airline's chief pilot by radio and it was agreed that the crew would use a "left-wing-down" technique ensuring the left main wheels touched down on the runway first, with the remaining right main wheel then being lowered onto the runway as gently as possible.

BBC: Flybe plane passengers 'saw wheel fall off'

Only von Trier would think to hitch overheated political fury to a stripped-down dramatic technique, and only he could begin to get away with it.

NEWYORKER: Manderlay

"You have to use it a number of times before you get the technique down, " she said.

CNN: Why people swear by the neti pot