SM4 จีโอโฟนแบบแนวนอน 14Hz ในกล่องจีโอโฟนแบบติดตั้งบนพื้นดิน พร้อมตัวเชื่อมต่อแบบสプリットสปริงคลิป สายจีโอโฟน 14 Hz มีสินค้าในสต็อก

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