英语词汇bell and howell perforation怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	bell and howell perforation
释义	bell and howell perforation 简明释义贝尔浩型片孔网络释义 1 ?贝尔浩型片孔贝尔浩型片孔双语例句 1 Bell and Howell perforation: a film perforation shaped with flat top and bottom and curved sides. 贝尔浩型片(齿)孔：上下平行两边弯曲的胶片齿孔。
随便看	impact burner impact cap impact cast impact cell mill impact cleaning impact coal mill impact coefficient impact compacter impact compactor impact compression impact compression test impact connector impact copolymer impact corrosion impact cost impact counter system impact crash switch impact crater impact craters impact crusher impact crushing impact current impact cutter impact cutting impact damage

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