mig, oxy-acetelene, arc,
Depends on the solder used. If silver solder is used it is actually stronger than the pipe itself.
incas
The Incas were.
There is more than 15 instruments techniques. Some of the techniques would be blow in, blow out, spit, line up and have fingers in place.
yes
Yes, graphite is more common than diamond.
It is not a matter of style. The key is the application of the techniques. It is more the individual practitioner than it is the style.
rain is more common than rain
You need more than one number to have a COMMON factor since common implies more than one.
using theatre techniques for more than just arts or entertainment purposes
No 12" RCP is more common than 15" RCP, 18" RCP is also more common than 15" RCP.
Most probabbly, more than you think.