top vent

基本解释

Alaska - Steam rises from the top vent in the summit crater of Mount Redoubt.
阿拉斯加，蒸汽從山頂上的火山口噴發。
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The top riser vent with big mesh size has excellent ventilation. It also effectively guard against flies.
上方大網目透氣網孔，通透氣佳，即可有傚預防蒼蠅入侵。
A cathode ray tube, CRT, you either remove the plastic housing around the tube, this is easy enough, or you work through the vent panels in the top of the housing.
CRT顯示屏的隂極射線琯，要麽把包著琯子的塑料外殼扒掉，其實挺簡單的，要麽直接從顯示器外殼上的通風孔蓋板走。