本來打算買一個hockey puck來加工, 但是puck的厚度隻有1寸, 而溝的深度至少也需要1寸 所以就算了
本來打算買一個hockey puck來加工, 但是puck的厚度隻有1寸, 而溝的深度至少也需要1寸 所以就算了
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