A unit bearing circuit components which can be plugged into a piece of equipment. 一种装有电路元件的插件板，可将它插入设备中。
Flat-top unit business card printing and membership card machine to transparently replace business card printing and membership card making flexible plug-ins. 平台式机组制卡和会员卡制息摆设可以纪律的调换制卡和会员卡制息插件，板滞性极不弱。
