blind hole未: did not; have not贯穿: run through breakthrough; pe ...的: 4次方是 The fourth power of 2 i ...孔: hole; opening; aperture盲: blind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:未贯穿的孔，盲孔，即可在微信中查询翻译
