Who said gas mixers have to be unwieldy?

https://www.lt-gasetechnik.de/wp-content/uploads/2020/07/lt-gasetechnik-beitragsbild-default.jpg 878 494 Alexander Hanf Alexander Hanf https://secure.gravatar.com/avatar/f89f4d10a36f5d89cef53cf152aa4130?s=96&d=mm&r=g 24. July 2018 20. July 2020