rail butts钢轨: rail; metals; steel rail; ra ...的: 4次方是 The fourth power of 2 i ...切: correspond to; be close to头: 5点就得动身 have to start before ...板坯的切头: slab butts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:钢轨的切头,即可在微信中查询翻译