orifice coefficient锐: sharp; keen; acute孔: hole; opening; aperture系数: coefficient; ratio; modulus; ...翻孔系数: burring coefficient射孔系数: perforation coefficient下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:锐孔系数，即可在微信中查询翻译
