seamle -tube rolling millseamless pipe rolling millseamless tube rolling mill无缝: seamless管: pipe; tube轧机: rolling mill连续式无缝管轧机: continuous seamle -tube rolling mill; continuous seamless tube rolling mill; continuous seamless-tube rolling mill芯棒式无缝管轧机: mandrel mill; mandrel polisher下载手机词典可随时随地查词查翻译