A moving tower means crane is very useful machine and is used in many places to take the heavy load and in many other places .many models of crane are present today ,they are high standard machines .every crane is designed to carry a great heavy amount of load with minimum force .the crane is the most widely used machine in the construction of building , factories and mills , the modern crane can easily lift 7,000 tones of weight , and an ordinary crane can transport an object to maximum 200 feet high .

A tall tower like machine crane is very familiar sight construction sites in big cities , the machine have a long neck or you can say it arm called crane machine .like the crane machine the bird is same name bird crane having a ling neck it can also lift any heavy object easily like crane with its neck . and it can up or down the neck .

China is a very developed country in the world , CHINA  has built the world stronger crane . it can carry weight about 2,000 tones . this crane has made a world new record in 2007 , this record has not been broken yet today .and is very useful for making the buildings and factories .

Crane basic parts are , Jib , hook , operation room . boom .

All the parts of crane are very useful and are very strong .

Floating crane is used to built barrages and dams ,because it can float on water easily , this 10,000 tones crane can easily lift 7,000 tones of weigh in water it is amazing .