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The back part of the sword body is platform-shaped, and the transversal profile is flat rectangular;
背面部分的剑体，是平台状，横向剖面是平面直角；
youdao
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The back part of the sword body is platform-shaped, and the transversal profile is flat rectangular;
背面部分的剑体，是平台状，横向剖面是平面直角；
youdao