Unverified80% confidenceDecision RuleTime unknown
镁棒直径与内胆牺牲阳极保护面积正相关,同长度下选直径21mm优于14mm,但需确认接口螺纹(常见3/4英寸即约21mm螺纹口)与热水器加热棒座匹配,直径过大无法安装
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