A parent class to extend function from (plus any "mix-in" classes to simulate multiple inheritance).
用于扩展函数的父类(以及模拟多个继承的“混合”类)。
DLL technology used to store the lattice information makes the software extend function or upgrade easily.
用动态链接库来存储字符点阵信息，利于软件功能的扩展和升级。
Open architecture PLC advantage is that it can extend function module by CAN-BUS, especially module with special function designed by users.
开放式PLC最大特点就是能通过CAN总线方便地扩展功能模块，特别是用户设计的特殊功能模块。
STB (set Top Box), which is designed to extend function of TV set, can provide multiple services since it has powerful capability of multimedia processing and enough IP network access bandwidth.
机顶盒是为扩展电视机功能的一种新的家用电器，它有强大的媒体处理能力，有足够的IP网络接入带宽，可以提供多种网络业务。
STB (set Top Box), which is designed to extend function of TV set, can provide multiple services since it has powerful capability of multimedia processing and enough IP network access bandwidth.
机顶盒是为扩展电视机功能的一种新的家用电器，它有强大的媒体处理能力，有足够的IP网络接入带宽，可以提供多种网络业务。
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