Is there any difference between these two?
Do (suppose) technical knowledge and technical know-how convey different meaning?
"Knowledge" is the acquaintance with the facts and information. You know it, in your head.
"Know-how" is the knowledge of how to do something. In other words, "know-how" is the ability to perform a task or action.
I think the terms knowledge and know-how are very similar. The only two small differences I can think of are perhaps that know-how is a bit less formal than knowledge, and that know-how may place a little more emphasis on knowledge of how to do something practical/physical, as opposed to knowledge being potentially more abstract. That said, you can certainly have knowledge about how to do practical/physical tasks.
Different perspectives :
Knowledge allows you to explain the thing
Know-how allows you to do / make the thing
Knowlegde is what your head knows. It is mental, conceptual.
Know-how is what your "body" knows. (Even if the body is steered by the brain) It is procedural.