What is 2-head integrated machine?

Some machines have only one function, either drilling or tufting, with only a drilling head or a tufting head.

For example, this is a 5-axis drilling machine with a single drilling head:

http://www.brush-machine.com/Video/CNC-5-Axis-Brush-Drilling-Machine.htm 

This is a 2-axis tufting machine with a single tufting head:

http://www.brush-machine.com/Video/CNC-Broom-Tufting-Machine.htm

2-Head integrated machine has functions of both drilling and tufting, it is installed with both a drilling head and a tufting head. Or, sometimes, if required by client, we could make it with two tufting heads only for tufting, or, with two drilling heads only for drilling.

For example, this is a 2-head integrated machine with a drilling head and a tufting head:

http://www.brush-machine.com/Video/2-Axis-2-Head-Brush-Drilling-and-Tufting-Machine--Staple-Type.htm

This is a 2-head machine with two drilling heads:

http://www.brush-machine.com/Video/3-Axis-2-Head-Drilling-Machine.htm