二级半转机构
double-half-revolution mechanism
double stage half-turning mechanism
二阶半线性脉冲微分方程
second order half-linear impulsive differential eq
second order half linear impulsive differential eq
二阶半线性微分方程
secnd order half linear differential equation
二钼半胱氨酸络合物
Dimolybdenum (Ⅴ)-cysteine complexes
二水法改二水-半水法
transformation of WPA process from dehydrated into dehydrated-hemihydrates method