... internal spiral 释义：内螺旋 external spiral 释义：外螺旋 tertiary spiral 释义：三生螺纹 ...
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外螺旋角式截止阀 Materials for main parts ; Chief property and specifieation
意外螺旋 involuntary ; spin
外螺旋轭阀 outside screw and yoke valve
外螺旋沟 [组织] external spiral sulcus
外螺旋偏航 outspin yaw
后外螺旋形 back out spiral
富山外螺旋角式截止阀 Materials for main parts ; Chief property and specifieation
外侧螺旋桨 outboard screws ; outer propellers ; outboard propeller ; wing propellers
采用外螺旋肋片管实现高温侧强化传热后，再热器管壁温度升高，所需贵重金属耗量增加。
The temperature of the tube went up and then the expenditure of expensive alloy increased by using extern spiral finned tube, which enhanced the external heat transfer.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。
If astronomers could observe metallicity gradients in spiral galaxies billions of light-years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
除了扮演传统直升机角色外，还具有涡轮螺旋桨飞机的长距离、高速巡航性能。
It is designed to perform conventional helicopter missions but with the long-range, high-speed cruise performance of a turboprop aircraft.
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