We do it... loud!
"The most common and simplest protection against continuous roar ears are provisional cones of cotton, saturated with petroleum jelly or glycerine."
Mgr W. Krajewski "Weaving mill" 1951.
"The most common and simplest protection against continuous roar ears are provisional cones of cotton, saturated with petroleum jelly or glycerine."
Mgr W. Krajewski "Weaving mill" 1951.