becket rowlock
... becket line 把手索 becket rowlock 桨圈 becket the helm 将舵柄用绳圈套住 ...
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螺桨轴安全圈 propeller shaft safety strap
绳圈桨叉 becket rowlock
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提高高旁通飞机引擎的方法之一就是把风扇变成开放式旋翼,有点回归于螺旋桨的味道,但要使用两圈粗短的反旋桨叶。
One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.
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