double tapered双: two; twin; both; dual锥形: taper; cone; cone-shape的: 4次方是 The fourth power of 2 i ...对双锥形的: diploconical双锥形: biconical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:双锥形的，即可在微信中查询翻译
