单词:protective system of heater
单词:protective system of heater 相关文章
Technology Report - How to Make Your Own Solar Water Heater This is the VOA Special English Technology Report. Solar water heaters are used around the world and are not very difficult to build. The system we are going to describe is based on a design
Ramparts Are Protective BarriersWhen you sing or listen to the Star Spangled Banner, do you understand the words? The national anthem of the United States of America was inspired by the Battle of Baltimore at Fort McHenry in 1814. The lyrics suggest
DEVELOPMENT REPORT – How to Make a Solar Water Heater By Gary Garriott Broadcast: Monday, November 29, 2004 I'm Gwen Outen with the VOA Special English Development Report. Solar water heaters save o
This is the VOA Special English Development Report. Solar water heaters are devices that use energy from the sun to heat water. Solar water heating is used around the world. An example of a rooftop solar water heater being built in South Africa The