Fresh air from outside circulates over the radiators and then rises into the rooms to be heated. 伯莎M.克拉克.科学通论.
In hot-water heating systems, fresh air is not brought to the rooms, for the radiators are closed pipes containing hot water. 伯莎M.克拉克.科学通论.
In addition to this work the construction of tops, curtains and radiators is carried on, and a large space is used for the storage of equipment and parts, such as lamps, horns, tires, etc. 佚名.神奇的知识之书.
The air which goes to the schoolrooms is warmed by passage over the radiators. 伯莎M.克拉克.科学通论.
It can also be purchased with different attachments with which curtains, radiators, clothes and walls may be cleaned. 佚名.神奇的知识之书.
From this point the chassis moves under the bridge upon which are stored the radiators, which have been delivered by a belt conveyor. 佚名.神奇的知识之书.
The hot water in the radiators cools and, in cooling, gives up its heat to the rooms and thus warms them. 伯莎M.克拉克.科学通论.