塑料是什么  what's plastic

塑料的分类the classification of plastic

塑料的机械特性mechanical properties

塑料的热特性thermal properties

塑料的电气特性 electric properties

塑料的环境特性environment properties

塑料的模塑特性molding properties

常用塑料介绍 introduction of some common plastic

壁厚的设计 wall thickness design

筋的设计ribs design

凸台、螺丝柱的设计bosses design

角板的设计gussets design

尖角的设计sharp corner design

拔模设计draft design

孔洞的设计holes and cores

倒扣的设计 undercut

模塑螺纹的设计Molded-in thread

模塑文字lettering

活动铰链设计living hinge design

塑料轴承设计plastic bearing design