N-COUNT A porthole is a small round window in the side of a ship or aircraft. 舷窗; 舱口
The neutron flux of reactor center port-hole is one of the important parameters for applications.
反应堆中央孔道中子注量值是反应堆的重要指标，也是反应堆应用的重要参数。
The way this burner system melts metal is simply by pushing the flame exit port up against the hole in the furnace which ordinarily would hold the propane burner (or air blast on a charcoal furnace).
这种燃烧器的方式系统的金属熔体的火焰推出境口岸打击在炉内的通常会举行一个木炭炉的丙烷燃烧器。
The air inlet and the control air supply port are distributed in a T-shape, and an air hole at the other end of the control air supply port is directly communicated with the air cavity.
进气口和控制气源接口呈丁字型分布，同时控制气源接口的另一端气孔直接通向气腔。
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