Threaded inserts are factory installed for securing hinges, door stop plates, and doorlatches.
螺纹嵌入件在工厂安装以加固合页、门挡板和门插销。
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"We were in the valley of death in April of 2009," says John Winzeler, President of Winzeler gear, whose small plastic gears go into doorlatches, lumbar supports and countless car parts.