preceding前: front的: 4次方是 The fourth power of 2 i ...焊接前的清理: cleaning before welding焊接前的预防措施: precautions before welding接前: brought down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:紧接前的，即可在微信中查询翻译
