preparation act预备行为preparationn.准备；预备；配制Preparation of unpolished rise cookie糙米曲奇饼干的研制preparation of cushion layer material垫层料配制Preparation of Polymer Blend Membrane聚合物膜的研制Preparation of Fibrous Cobalt Complex纤维状复杂钴盐的制备preparation washing - water balance洗水平衡Preparation of Nano-particles of CdS硫化镉纳米粒子的制备PREPARATION OF NEW ELECTROTHERMAL FILM新型电热膜的研制preparation of CTV polyclonal antibody抗体制备Preparation of a polyurethane emulsion一种聚氨酯乳液的研制Preparation of Acrylic Retanning Agent丙烯酸类复鞣剂的研制