吹塑成型是成型中空塑料制品的主要成型方法，其成型过程包括型坯成型、型坯吹胀和制品的冷却固化三个阶段。
Blow molding is the main molding method for the hollow plastic products, including three steps such as parison formation, parison inflation and cooling solidification in its molding process.
课堂志研究的一般过程包括研究对象的确定、课堂参与观察、撰写课堂志三个主要环节。
The general process of class Chronicles includes the determination of study object, class involvement and observation and writing of Chronicles of class teaching.
干洗过程包括三个主要步骤：清洁或清洗服装；
The dry cleaning process consists of three principal steps: cleaning or washing the garments;
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