You can use screen doors. Fishermen uses hand tied flies. Roofs built with hay or straw gives home or huts good ventilation. There are also mechanical ways for air to flow.
A ventilation slit is to let fresh air into the castle and to shoot arrows from.
You are operating a boat with a power ventilation system. If you have just fueled this boat, it will take 1 minute to let the ventilation system run before starting the engine.
You are operating a boat with a power ventilation system. If you have just fueled this boat, it will take 1 minute to let the ventilation system run before starting the engine.
You are operating a boat with a power ventilation system. If you have just fueled this boat, it will take 1 minute to let the ventilation system run before starting the engine.
You are operating a boat with a power ventilation system. If you have just fueled this boat, it will take 1 minute to let the ventilation system run before starting the engine.
You should let the ventilation system run about four minutes before starting the engine on a boat.
You are operating a boat with a power ventilation system. You have just fueled this boat. How long should you let the ventilation system run before starting the engine?
Zoo's imitate animal's natural habitats and also provide information about how these animals live, hope that helps :D
The government action insures that we don't waste resources building additional plants when only one is needed. In return, a firm with natural monopoly agrees to let government control the prices it can charge and what services it must provide
Ralph spoke. "You let the fire go out."
To allow air in and out so the skin can breath.
Fish let out natural gases. That gas is oxygen but they do not let out methane or any other gases.