corrugated cylinder波纹: ripples圆柱: column螺纹圆柱销: parallel pins with external thread内螺纹圆柱销: parallel pins with internal thread圆柱管螺纹圆板牙: round die for straight pipe threading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:波纹圆柱，即可在微信中查询翻译
