The need for construction of specialized ships to clear the path in the ice appeared in the mid-18th century. The first icebreaker was a wheeled steamer that cleared ice in the harbor of Philadelphia.

Mining crushers are used to reduce the size of run-of-mine (ROM) ore for further processing. Rock breakers are sometimes used in combination with crushers to reduce the feed size before the start of ...

Are you looking for challenging tongue twisters for kids to learn pronunciation? Tongue twisters help kids learning to speak ...

Are you looking for intriguing riddles for kids with answers to keep their minds engaged? This post has mind-altering riddles ...