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.
Australia is the world's largest producer of bauxite. Australia, New Zealand, New Guinea and other islands on the Australian tectonic plate are together called Australasia. They form one of the world's great ecozones.When other Pacific islands are included, the term is Oceania.ustralia is the world's largest producer of bauxite. Australia, New Zealand, New Guinea and other islands on the Australian tectonic plate are together called Australasia. They form one of the world's great ecozones.