... incernal undercut 焊道底边或内表面咬肉 Undercut Depth 倒凹深度 to undercut 使打折扣 ...
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倒凹深度
Depth of concave
以上为机器翻译结果，长、整句建议使用 人工翻译 。
相同倒凹深度上，磨牙金合金卡环固位力比前磨牙大。
The retention of gold alloy clasp on the molar was greater than that on the premolar in the same condition of undercut.
youdao
The retention of the clasp on molar is greater than premolar in the same condition of undercut.
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