perforations
美 [ˌpɜrfəˈreɪʃ(ə)n]英 [ˌpɜː(r)fəˈreɪʃ(ə)n]
- n.穿孔;打眼;孔眼;射孔
- 网络齿孔;射孔方案;冲孔
复数:perforations
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