quartn.夸脱（容量单位）quartic-square multiplier开四次方运算器quartic diophantine equation4次Diophantine方程quartie anharmonie oscillator四次非简谐振子quartic congruential equation4次同余方程quarte-wave matching section[电] 四分之一波长匹配段quarte-wave transmission line[电] 四分之一波长输送线Quartic truncation moment problem四阶截断复矩问题quartic exponential smoothing method四次指数平滑法quartenary ammonium salt of polysaccharide季铵基聚糖