大口径 Traditional form: 大口徑 Pinyin (reading): dàkǒujìng Definitions: large caliber Characters: 大 - big, great, vast, high, deep 口 - mouth; entrance, gate, opening 径 - path, diameter; straight, direct Traditional characters: 大 - big, great, vast, high, deep 口 - mouth; entrance, gate, opening 徑 - path, diameter; straight, direct