肉抜き孔

US2004045752(JP)
"7. The hybrid vehicle drive system according to any one of claims 1 to 6, wherein 
the disk portion of the rotor support plate has weight-reduction holes（肉抜き孔）formed in an area extending from the portion fixed to the front cover to the internal diameter portion."

US2016251049(JP)
"6. The screen moving device in a saddle-ride-type vehicle according to claim 1, wherein a wall thickness reducing hole（肉抜き孔）is formed in the grip."

グーグル翻訳：
「肉抜き孔」"meat vent"
「冷却ファンは肉抜き孔を有する」："The cooling fan has a lightening hole."