It seems to me that industrial marketing is like talking to an interested audience in a small room – it is not necessary to raise your voice too much to have a big effect.
Trade and tech media are very helpful in this as they specifically focus on the very engineers, specifiers, and buyers who make up this niche.
It is similar in fact to a very large national trade exhibition where all your potential customers come together – but re-run 24/7 using the impact of print media and the convenience of the internet.