Of course is the rifled gun, the gun is designed crash before the mid nineteenth Century. At present, only emphasizes the smoothbore high velocity direct tank gun of this demand, not the other needs, and in order to ensure the accuracy of long-range shooting only with rifled gun. There is enough space for warships. If there is a need for firing speed, water cooling systems can be used, and anti-aircraft guns and infantry fighting vehicles are not likely to be water-cooled in size and quality.
Silicone hose is ok. You have the intermediate frequency producer to do some debugging and harmonic processing for you. Special intermediate frequency furnace fittings selection is critical
You do not want to blow after water! It won't be soft after a while. We use rubber tubes
A rubber light pipe, or a little bit of a capillary.
