... 群的可换元素 commutative element of group 可换体 commutative field 可[交]换群Abel(阿贝尔)群 commutative group ...
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安装料压传感器，可避免漏换和错换，并可降低熔体压力30 %以上。
The filter equiped with a melt pressure sensor could avoid wrong change and decrease the melt pressure by 30 %.
借助六速手自一体变速箱，在开阔道路上或是感觉有些沉闷时可切换为手动模式，让车子从老老实实的驯服状态一下子脱胎换骨。
The six-speed automatic , with the shifter in manual mode, helps the car shed its cast of servile domestication when the road opens up and the driving mood darkens.
本发明公开了一种可快速换贴图案的聚氨酯高回弹发泡体印章，包括章柄(1)、图案章体(2)。
The invention discloses a polyurethane high resilience foam stamp being capable of fast changing patterns, which comprises a stamp handle (1) and a pattern stamp body (2).
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