The impeller is arranged in an inner cavity formed by a pump cover and a pump body at the lower end of the pump shaft, and back blades are arranged on the impeller and are fastened by locking bolts;

在泵轴的下端，泵盖及泵体形成的内腔中设置有叶轮，叶轮上设有背叶片，并由锁紧螺钉紧固；

youdao

Unlike the blades on old-fashioned propeller engines, these blades spin around at the back of the engine.

与老式螺旋桨发动机的叶片不同，这些叶片在发动机的后部旋转。

youdao

Squeeze your shoulder blades together and concentrate on stretching your upper back.

将你的肩胛挤到一起，专注于拉伸你的上背。

youdao

During his career he has fallen almost 700 times, breaking his back, shoulder blades, collarbones, ribs, ankles, cheekbones, a wrist, and a leg in the process.

BBC: Jockey McCoy 'humbled' by Sports Personality award

While the EBITDA margins for Gillette have already declined over 2008-10 behind razors sold at highly discounted prices, we currently forecast EBITDA margins to rise gradually as consumers come back to buy blades.

FORBES: P&G Rising To $84 With Downside Risk If It Has A Tough Time Selling Soap And Razors To India

The fact that it was a strike from Tevez - plus a penalty from Wigan's Sheffield United old boy David Unsworth - which sent the Blades back into the Championship after only one season in the top flight only added a dash of irony to the last-day drama.

BBC: Tevez delivers final twist