A spasm is a sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ such as a heart, or a similarly sudden contraction of an orifice.It most commonly refers to a muscle cramp which is often accompanied by a sudden burst of pain, but is usually harmless and ceases after a few minutes. spasm is a sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ such as a heart, or a similarly sudden contraction of an orifice.
Top 10 largest Cement Producing Countries in the World. China has the first stage in the list of cement producing countries. They produce more than 2482 million tonnes. It is mainly used for construction and china is highly populated.
While metals can be broken down into a laundry list of types, as far as the overall industry is concerned, BHP Billiton (BHP) is by far the largest. With a market cap of $122 billion, BHP is not only the biggest metals conglomerate, but also one of the biggest companies in the world. BHP is consistently ranked in the Top 10 Producers lists. The company is headquartered in Melbourne, Australia, though it also has a major office in London, England.