Currently the C18 is commonly used (composed of 18 C).We also can supply you with C12, C8, C6, C4, C1 besides that.是什么意思_Currently the C18 is commonly used (composed of 18 C).We also can supply you with C12, C8, C6, C4, C1 besides that.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句