... invisible zipper/conceal zipper隐形拉链 backing coating涂层 buckle loop钮圈 ...
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Image Backing Coating 图象衬度
The invention discloses an alloy coating bushing which comprises a steel backing layer, a substrate layer, a nickel grid layer and a friction-reducing layer which are sequentially arranged.
本发明公开了一种合金镀层轴瓦，包括依次设置的钢背层、基底层、镍栅层和减摩层。
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