standard bore back慢速: low speed; idling退: retreat; draw back; move bac ...刀: knife; sword快速退刀: rapid return退刀: retract; tool backlash movement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:慢速退刀，即可在微信中查询翻译
