barrel compression spring
... barrel compression non-linear spring 鼓形压缩非线性弹簧 barrel compression spring 鼓形压缩弹簧 Barrel compression tapered wire spring 鼓形压缩有推拔（变截）线材弹簧 ...
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短语
鼓形压缩非线性弹簧
barrel compression non-linear spring
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