drilling ball
... Drilling and milling machine 钻铣两用机床 Drilling ball 钻孔球 Drilling capacity 最大钻进深度，最大钻孔直径 ...
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保龄球的发源地可以从义大利北部说起，当时的保龄球是由木头制成并没有钻孔，人们是用双手拿著球。
The birthplace of the bowling can be talked about from north of Italy, the bowling at that time was to make of wood holing; people were holding the ball with both hands.
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