tricone bit三维: three-dimensional式: type; style钻头: boring crown; bore bit; dril ...三维式岩石钻头: tricone rock bit差动式钻头: differential bit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:三维式钻头，即可在微信中查询翻译
