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单词
PPM
释义
PPM
PPM
1.
■
=Parts Per Million 百万分之几, 百万分率;
2.
■
Periodic Permanent Magnet 周期性永久磁铁;
3.
■
Pulse Phase [Position] Modulation 脉冲相位[位置]调制;
4.
■
Pulses Per Minute 每分钟脉冲数
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更新时间:2025/6/30 11:25:17