a ventilation system that must be ducted through the wall.
必须穿过墙壁的管道通风系统。
a ventilation system that must be ducted through the wall.
必须穿过墙壁的管道通风系统。
A test of arrosion performance of anticorrocive built-up weld layer in different meeiums was con-ducted by using a self-made arrosion testing machine.
用自制的腐蚀磨损试验机对耐蚀堆焊层介
中的腐蚀磨损性能进行了试验,结果表明:腐蚀介
,堆焊层的磨损速率也
。
In addition, the USAF continues to fund development work of the Aerojet (formerly Atlantic Research) Variable Flow Ducted Rocket ramjet system as a future propulsion option for an extended range AAM.
此外,美国空军继续投空喷气研究所(原来的大西洋研究所)的可变喷流管火箭发动机系统,将其作为增程空空导弹的未来推进选项。
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