请输入您要查询的英文单词：
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。
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更新时间：2025/3/30 3:46:39