invarn.因钢；镍铁合金INVabbr.发明者(=Inventor)abbr.反相器(=Inverter)abbr.体外授精(=in vitro fertilization)involute curve渐开线involute blade内旋调制叶片involute flank渐开线齿面invisiva gland切牙腺invading China侵华图谋invading model攻击模型involution law对合律Invitro cuhure体外培养inviting a bid投标involving rate涉及率