air hole

A hole in a Casting caused by air or gas trapped in the metal during solidification.

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air hole

A hole in a Casting caused by air or gas trapped in the metal during solidification. ...
VENT HOLE

VENT HOLE 概況 PASSENGER CABINWINDOW上面是有一個小孔的，在窗的最下方，叫做VENT HOLE，旅客窗...了，這時候這個小孔的作用就體現出來了，CABIN內的AIR正是通過這個小孔進入...
VENT HOLE 概況
White tea

A Basic Overview White tea, white tea is one of six tea White te...
A Basic Overview Historical Origin

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