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