preparationn.准备;预备;配制
Preparation factors制备条件
preparation process制备工艺
preparation technic制备工艺
preparation expense[经] 准备费, 筹备费
preparation thought思想准备
preparation gateway采准巷道
Preparation quality制剂质量
preparation of size浆液配制
preparation contact准备触点
preparation of soil整地