502防潮但不防水,也不耐磨,光圈片是排在一个圆盘上,并不固定死,用502沾的是限制位置的销钉,基本不受力。
502防潮但不防水,也不耐磨,光圈片是排在一个圆盘上,并不固定死,用502沾的是限制位置的销钉,基本不受力。
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