大口径 dàkǒujìng large caliber Definitions Defs Origin Strokes Stroke Words Sentences Sents 大 dà adjective big big; large; great; vast; high in scale or intensity; (of a person) old; adult口径 口徑 kǒujìng caliber the internal diameter of a circular opening, such as the bore of a gun, a pipe, or a telescope lens
