发明授权
US06655832B2 Structural component made of hard material for a wristwatch 有权
用于手表的硬质材料制成的结构件

Structural component made of hard material for a wristwatch
摘要:
A structural component made of hard material for a wristwatch, characterised in that it includes a hole fitted with an inner threading which is integral with said component, said threading being directly obtained by injection and thus without removing any material of said component for example by machining.
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