OLT设备的主要模块包括电源模块、管理模块和交换模块等，业务模型主要包括高速上网业务和组播业务。
The main module of OLT equipments includes power supply module, OBC module, IWF module, EPON module and so on. Service models mainly include HSI service and IGMP service.
一种太阳能热水器装置，其包括热电转换模块、集热器、热交换器、光聚焦板及电源系统。
The invention relates to a solar water heater device, which comprises a thermoelectric conversion module, a heat collector, a heat exchanger, an optical focusing plate and a power supply system.
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