sealed window 中文意思是什麼
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An indication rod or viewing window is set ascend and descend stemwith the valve to whow the open - close condition, revolve stem with the valve use a sealed gear - driving open - close indicating mechansim
升降桿閥門設有指示桿或觀察窗以表示閥門的啟閉情況，旋轉桿閥門採用封閉齒輪轉動啟閉指示機構。 -
Because the working media of laser is gas, and the pressure difference between the inner apparatus and environment of laser is large, so the window of output laser beam must be sealed
由於其激光工作介質是氣體，而且激光腔內的壓力與外界環境壓強相差很大，激光束的輸出窗口必須密封。
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