un. 基孔制 unit bore system: 基孔制unit bore: 基準(zhǔn)孔micro bore unit: 精調(diào)刀頭; 精密微調(diào)鏜刀頭basic bore system: 基孔制micro-bore heating system: 微管采暖系統(tǒng)下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯