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double helical spring
meaning in Chinese
复式弹簧
复式螺旋弹簧
Related Words
helical cutting
helical tiller
helical lampl
helical band
double helical
helical motio
helical manometer
helical conformation
helical twist
helical antenna
double helical mixer
double helical pinion
double helical spur gear
double helical spur wheel
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