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弯拱作用
meaning in English
arch action
Related Words
横向拱
缺口拱
拱石
向上拱
回廊拱
弧拱
板拱
塌落拱
端拱
抑拱
弯拱
弯拱;纸浆桶搅拌器;向上拱曲;缩粒机
弯钩
弯钩地脚螺栓
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