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扇形凹口
gen.
scallop
tech.
scallops
扇形凹口
为减小轮辐与轮辋的接触面积，轮缘内侧有一圈凸起的扇形面，该面与轮辋形成扇形凹口
auto.
scallop
扇形凹口:
4 phrases
in 1 subject
Ichthyology
4
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