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.
Air vacuum excavators utilize the kinetic energy in a high velocity air stream to penetrate, expand and break-up soil. The loosened chunks of soil and rock are then removed from the hole through the use of a powerful vacuum. In this way a test hole is created that reveals the buried utility. Holes vary in size and shape. A typical test hole