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	ringing interrupter ringing in the ear ringing in the ears ringing junction working ringing key ringing lead ringlead ringingly ringing machine ringing margin ring me ringing (method) ringing number ringing numbers counter tank ring off ring off the hook ringing of joint ringing of pulse Ringing of the Ears ringing out ringing period ringing periodicity ringing pilot lamp ringing position ringing pulse

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