用 Norman Tool Inc 原裝的校正板檢測。此校正板已在 Norman Tool 的 master 機上做了標定,并帶 有一張證書標明紙帶在校正板上磨穿所需的圈數。(當你需要購買些校正板時,需提供你的原裝 RCA 機的序列號) This item will have been tested on Norman Tool‘s "Master Tester" and includes all test results. You must provide your tester serial number to receive this kit.