Yes: Influenza b virus is a respiratory virus spread by coughing, etc. The two main types of influenza occurring during flu season are influenza a and influenza b. Influenza b often causes more GI symptoms.
Excavators are vehicles that are used on construction sites to move material. 1  slide 1 of 2. Excavators: Also Known as Diggers and Backhoes An excavator uses hydraulics or a wire rope pulley system to dig holes or trenches and is, therefore, often called a digger. 2  slide 2 of 2. Examples of Excavators.
That is the reason why excavators used were made very big and heavy. However, later on, these big excavators were of bigger inconvenience to the users for moving. And in most cases, a less powerful but a much lighter excavator can also perform the task very well. As a result, mini excavators came into existence.