Coarn.科尔COpref.共同；一起；联合abbr.公司（=company）abbr.郡；县（=county）abbr.指挥官（=Commanding Officer）Cochliodontidae旋齿科coulomb balance用电平衡coking behavior结焦性能Co-base alloy钴基合金coking in riser提升管结焦co condensationn.共缩作用coho oscillator相参振荡器co-adsorption共吸附cocenric citcle同心圆covalent radius共价半径,共价键半径