basic bore systembasic hole systemhole base systemhole basishole-basic system of fitshole-basis systemunit bore system基: base; foundation孔: hole; opening; aperture制: make; manufacture基孔制装配系统: hole-base assembly system基孔: basal orifice; base bore; basic bore; basic hole system; datum hole; hole basis下载手机词典可随时随地查词查翻译